Make Your Own Rainbow Cake

The other day, I was walking around the garden centre with my mum and something caught my eye. It was this bright and colourful Rainbow Cake Baking Kit by Bakedin. I’ve never seen these before, but a baking kit sounded like the dream to me as I am certainly not a natural baker (See: Make Your Own Gingerbread House). I read the back of the box and discovered that you only needed to buy the kit + an extra 3 ingredients which was simple enough so decided to give it a try. Here is how it went:

After you have bought the kit, all you need to buy is 4 eggs, 500g butter and 120 ml of milk.

Inside the box, you get everything you need: red, orange, yellow and green cake mix, icing sugar, sprinkles, baking tins, baking paper, butter measure and cake board. Each item is labelled with a number to make things even more straight forward. This is my kinda kit.

The recipe card explains everything you need to know and it is easy to follow. Before I began my cake making, I preheated the oven to 180 degrees.

Here is the step-by-step guide to make your own rainbow cake:

Step 1: Prepare your baking tins by lining them with the paper provided.

Step 2: Measure out 60g of butter and add in to a mixing bowl. The handy conversion chart and measuring card helped me out here as my kitchen is lacking in a pair of scales. I love how easy they make this for the most amateur bakers like myself.

Step 3: Empty the contents of bag 1 (red cake mix) into the bowl and mix until it forms a crumb like consistency.

Step 4: Add one egg and 20ml of milk into the bowl and mix until smooth and creamy.

Step 5: Pour the mixture into the prepared tin and smooth out.

Step 6: Wash bowl and repeat steps 2 – 5 with the other three cake mixes.

Step 7: Once all four cake mixes are prepared, pop them into the oven for 20 – 25 minutes and hope for the best…

Whilst the rainbow layers are cooking, you can start making the butter cream (this stuff is seriously delicious).

Step 8: Add 260g of butter into the bowl and mix. It works out that 260g of butter should be left in the tub anyway so no measuring required. Win.

Step 9: Add the icing sugar (bag 5) into the bowl and mix well. Add 40ml of milk into the mix to make the butter cream even creamier.

Step 10: Spread a layer of the delicious butter cream onto the cake board provided. It is mandatory that you sample the butter cream at regular intervals.

Step 11: Once the rainbow layers are baked, let them cool for 10 minutes. Now build your rainbow cake (green, yellow, orange, red) using the butter cream between each layer which acts as a very tasty glue.

I admit at this stage I was feeling slightly concerned about the outcome of my rainbow cake as it wasn’t looking very colourful to me. However, I carried on and hoped it would all magically appear at the end.

Step 12: Smother the entire cake in butter cream.

Step 13: Decorate the cake in sprinkles and hope there is a rainbow inside…

Step 14: YAY! A rainbow! As you can probably tell, I am shocked this actually worked.

Making a rainbow cake took just over an hour – 30 minutes to prepare the layers, 25 minutes to bake whilst preparing the butter cream and finally 10 minutes to decorate. The instructions included in the kit make this a really simple recipe and pretty exciting as you don’t find out if the rainbow has worked until the very end. Have you made a rainbow cake? Click here to buy your own Rainbow Cake Baking Kit by Bakedin.

Bakedin do loads of other awesome looking kits too such as: a Choc Mallow Melt Cookie Kit, Iced Cinnamon Bun Kit, Double Choc Brownie Kit, Chocolate Layer Cake and a Sticky Toffee Cake Mix. If you give any of these a go, let me know how it goes as I would love give another one of these kits a try.

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  1. June 29, 2018 / 7:29 am

    Wish I had known about this when I spent hours upon hours making a rainbow cake for my daughter’s birthday! Lovely post and the cake looks scrumptious 😍

    • June 30, 2018 / 8:41 pm

      Aw thanks so much Soffy! 💖 Wow, well done for making your own rainbow cake, that’s awesome. I imagine it was complicated if you don’t use a baking kit 🙈😘 xx

  2. Ruth
    June 29, 2018 / 8:26 am

    Looks like you did an amazing job, Bexa! 🙂 I really want some cake now…

    • June 30, 2018 / 8:42 pm

      Aw thank you so much Ruth! 💖 It was very tasty, especially the butter cream! 😍 xx

  3. June 29, 2018 / 9:03 am

    Great instructions. I love clear photographs with baking instructions. I made a rainbow cake four years ago for my Rainbow Guides. It was different to this though, more like a marble cake. I would love to include some baking on my blog.

    • June 30, 2018 / 8:44 pm

      Thank you so much Louise! 💖 It was really fun to make and so tasty too 😘 xx

  4. Rachael Stray
    June 29, 2018 / 9:04 am

    After seeing your picture on Twitter I had to read this post. Cake looks amazing hun. Those colours are so vibrant. Was it yummy?

    • June 30, 2018 / 8:49 pm

      Aw thanks so much Rachael! 💖 It was such a tasty cake, it’s all gone now but can’t wait to try another baking kit 😍 xx

  5. June 29, 2018 / 10:16 am

    Wow this cake looks so pretty and yummy! I love the kits as they make it so simple yet you feel like you are a true pro baker! Thanks for sharing a wonderful recipe Bexa xx

    Rebecca |

    • June 30, 2018 / 8:57 pm

      Aw thanks so much Rebecca! 💖 The baking kits are really handy, I’m not sure I could of done this without one he he 🙈😂. Glad you enjoyed the post lovely 😘 xx

  6. Shaun
    June 29, 2018 / 11:35 am

    It looks like you had fun making your rainbow cake 🌈 🍰😄. I can imagine it was exciting waiting to find out if the rainbow will appear ☺️. It looks very pretty and tasty 😋. I will look forward to trying some later 👍. A brilliant post Bexa 😄😍💖😘 xxxx

    • June 30, 2018 / 9:03 pm

      Aw thanks so much Shaun! 💖 It was really fun to make and I’m glad you enjoyed your (enormous) slice 😂😁😘😍 xxxx

  7. June 29, 2018 / 1:54 pm

    Yours looks amazing! I bet if i tried i’d fail haha, baking isnt a good skill of mine!

    • June 30, 2018 / 9:06 pm

      Aw thanks Ellie! 💖 I was surprised it actually worked 😂 baking isn’t a great skill of mine either 😜🙈 xx

  8. C. Lynn Richards
    June 29, 2018 / 2:31 pm

    Bexa, the 🌈 cake looks divine! I bet it tastes as good as it looks. 😍

    • June 30, 2018 / 9:06 pm

      Aw thank you so much lovely! It was such a tasty cake, its all gone now though 😂🙈😘 xx

    • June 30, 2018 / 9:13 pm

      Thank you so much Lily, I would definitely recommend 💖 xx

  9. Alys George
    June 29, 2018 / 7:04 pm

    This cake looks so yummy! I’ve never been any good at baking but you may this so easy to follow!

    Alys /

    • June 30, 2018 / 9:16 pm

      Thanks Alys! The baking kit did make things so much easier, I’d definitely recommend 😘💕 xx

  10. June 29, 2018 / 7:04 pm

    RAINBOW CAKE!! It’s beautiful. I’ve seen a rainbow cake only once-and I remember being in awe at the amount of colours. I don’t have the skill to make one, though, sadly 😀

    • June 30, 2018 / 9:17 pm

      Thanks so much Lydia! The baking kit did make things a lot easier, I’m not sure I could make this from scratch 🙈😘 xx

  11. June 29, 2018 / 7:10 pm

    This sounds and looks like my kind of kit too! Thanks for breaking down the steps! Really made it easy and simple for us to follow, I would love to make this as it looks so nice but I think I would love to make the Iced Cinnamon Buns more haha!! xx

    • June 30, 2018 / 9:24 pm

      Thanks so much Shar! 💖 So glad you enjoyed the post and same here, I’d love to try the iced cinnamon buns, they sound amazingly delicious! 😍 xx

  12. Sophie
    June 29, 2018 / 7:11 pm

    I love baking kits! I usually use Betty Crocker ones which are delicious, but usually not this pretty! I make sure to sample frosting at regular interviews too haha! I hope that this tastes as good as it looks!
    Sophie – x

    • June 30, 2018 / 9:25 pm

      Thanks so much Sophie! It was sooo tasty 💖. I need to try out these Betty Crocker ones, I’m now a big fan of baking kits, they make everything so much easier 😍💕 xx

  13. June 29, 2018 / 7:13 pm

    These cakes look fab and me and my daughter are both rainbow obsessed 🌈🙂👍🏻

    • June 30, 2018 / 9:26 pm

      Thanks Katie! This is definitely a must for the rainbow obsessed 🌈😍💕 xx

  14. June 29, 2018 / 7:39 pm

    Great post! The cake turned out amazing, it looks so delicious. I definitely need to make one of these soon x

    • June 30, 2018 / 9:31 pm

      Thanks so much Hanna! 💖 It’s such a fun thing to do and super tasty too! 😘 xx

  15. June 29, 2018 / 7:44 pm

    This is such a pretty cake! and it looks so good! can i have a slice?! I’ll try to make one myself!

    • June 30, 2018 / 9:31 pm

      Thanks so much Corinne! 💖 It was lovely! He he, I would but it seems to have disappeared already 🙈😂😘 xx

    • June 30, 2018 / 9:32 pm

      Yay! Hope you enjoy! 💖 xx

  16. June 29, 2018 / 8:19 pm

    This looks so cool! I am definitely going to look out for one of these. How did it taste? I love how this actually looks colourful. I can imagine what my attempt would look like if I tried to make one from scratch 😀

    • June 30, 2018 / 9:36 pm

      Thanks so much Kat! 💖 It tastes amazing, especially the butter cream 😍. The kit is so handy, I don’t think I could make it from scratch either 🙈😂 xx

    • June 30, 2018 / 9:42 pm

      Thank you so much Emma! It was delicious! 💖 xx

  17. June 29, 2018 / 9:54 pm

    Hi Bexa, As always, your posts are so beautiful to look at and make me think I could actually do something creative or crafty. And that’s saying something because I’m not the crafty type! Though I do enjoy baking quite a bit. When I saw the picture, I thought it was going to be difficult and involve a bunch of pans and food coloring and what-not. But it sounds like the kit did so much of the work and helped minimize the clean-up too – which is the part I don’t enjoy very much. The colors are so vibrant. I’m going to have to see if I can find this kit here in the States.
    Thanks for sharing this!

    • June 30, 2018 / 9:52 pm

      Aw thank you so much for your lovely comment Joan! 💖 I was surprised how easy this was to make, and you just throw the baking tins away afterwards = no messy clean up 👍🏻. I hope you find this or something similar over in the States! 😘 xx

  18. June 30, 2018 / 1:00 am

    I’ve seen rainbow cakes and they look so cute! At the same time, it looks like a lot of hard work with the layering and stuff. I like that the kit makes it easy for you to make them. Love how everything turned out!

    Nancy ♥

    • June 30, 2018 / 9:54 pm

      Thanks Nancy! 💖 Glad you enjoyed the post. I was surprised how easy this kit was, I’m not sure I could make it from scratch 🙈😂😘 xx

  19. Laura M
    June 30, 2018 / 2:49 am

    It looks so soft! I love how the colors turned out, specially the red. I’ve always thought rainbow cakes were difficult but you made it seem so easy.

    Laura M –

    • July 1, 2018 / 8:05 am

      Thanks so much Laura! 💖 I was surprised how easy it was to make! So glad you liked the post 😘 xx

  20. Ellaine
    June 30, 2018 / 6:07 am

    Another colorful post! But this time it is a cake! And im excited hahhaa! 🙂 i think i neved had rainbow cakes before. I guess I’ll have to try now. Too much sweets will never be bad (hahaha!!) 😉

    Ellaine | In Betweens

    • July 1, 2018 / 8:10 am

      Aww thanks Ellaine! Glad you enjoyed the post, and I agree, you can never have too many sweets he he! 😂😍💕 xx

  21. June 30, 2018 / 7:25 am

    Your cake looks so good! I’m not much of a baker either, but if I can find a kit like this here in The Netherlands I will definitely give it a try 😀 I love rainbow cake <3

    • July 1, 2018 / 8:16 am

      Thank you so much Michelle 💖 So glad you enjoyed the post and hope you can find a kit like this in The Netherlands 😍 xx

  22. June 30, 2018 / 8:00 am

    This looks so yummy and easy! When I make a cake from a box I never really stray away from Betty Crocker! xxx

    • July 1, 2018 / 8:23 am

      Thanks Jenny! 💖 I’ve never tried a Betty Crocker cake, I’ll have to check them out! xx

    • July 1, 2018 / 8:31 am

      Thanks so much Claire! So glad you enjoyed the post, the cake was delicious! 💖 xx

  23. June 30, 2018 / 5:28 pm

    YAY! You did it! This looks super fun and I’m amazed at how easy it is! I’m an awful baker so maybe this is the product for me! Thanks for sharing!!

    Lots of love,
    Molly xo

    • July 1, 2018 / 8:37 am

      Thanks so much Molly! 💖 I was surprised how easy it was too! Glad you enjoyed the post lovely 😘 xx

    • July 1, 2018 / 8:52 am

      Thank you so much! 💖 xx

  24. Lex
    July 1, 2018 / 12:39 am

    Wow! Nice job! I don’t think mine would come out the same way…I can cook, but baking was never my strong suit!

    Lex | The Lady On Lexington Street

    • July 1, 2018 / 9:01 am

      Thanks so much Lex! 💖 I was surprised this turned out okay as I’m definitely not a baker 😂. Glad you enjoyed the post xx

  25. July 1, 2018 / 7:55 am

    I am terrible at baking but this looks really easy- I love the fact that things are numbered! Your cake looks absolutely delicious I need to bookmark this as it would be perfect to try for one of the kids birthdays instead of buying one!
    Great post 😃

    Melanie |

    • July 1, 2018 / 9:13 am

      Thanks so much Melanie! 💖 Yay! So glad you enjoyed the post, the numbered bags are definitely helpful and make it all so much easier 😘 xx

  26. Hels
    July 1, 2018 / 8:04 am

    This looks amazing! I tried to make a rainbow cake once but all the layers just looked the same! I’m so impressed with how this turned out, and it sounds so straightforward to bake too!
    Hels xx

    • July 1, 2018 / 9:14 am

      Thanks so much Hels! 💖 So glad you enjoyed the post, I was really surprised and impressed with it too 😍 xx

  27. Lena Dee
    July 1, 2018 / 8:22 am

    Aww you’re me little baking station looks SO cute and tidy 😮 like these ice are gorgeous! Honestly you did a really good job, it’s layered so nicely! Like at least you didn’t drop any of the layers, I’ve seen that’s happen before lol 😭😭 it’s so beautiful and yummy looking, I’d like my slice from your next one air mailed with love please and thank you 😂🍰🌈👩🏼‍🍳

    xx Lena |

    • July 1, 2018 / 9:29 am

      Aww thanks so much Lena! 💖 I was surprised it turned out okay, I had visions of me dropping layers or they all turn brown or something 😂🙈. He he, next time I’ll send you a slice, I’ll try not to eat it all first 😜💕 xx

  28. Kate
    July 1, 2018 / 8:26 am

    This looks so yummy! I like how you give how long it took you to bake and decorate as well
    I’ve never made a rainbow cake but it always looked complicated

    Kate xx

    • July 1, 2018 / 9:40 am

      Thanks Kate! 💖 I’m glad you enjoyed the post, the decorating and sampling the butter cream was the best bit 😍💕 xx

  29. July 1, 2018 / 8:30 am

    Who doesn’t love cake and colour? 🙂

    I brought a set ages ago, think i’m going to have to dig it out and bake! Gonna have to throw a load of unicorn themed stuff at it! I need unicorns and rainbows. Great post!

    • July 1, 2018 / 9:46 am

      Thanks so much Abby! Yay for unicorns and rainbows! That sounds awesome. I’d love to see how it turns out! 💖🌈🦄 xx

  30. July 1, 2018 / 8:57 am

    I did know you could get rainbow cake kits. This is so cool

    • July 1, 2018 / 9:55 am

      Thanks Ashton! They are really fun and tasty! 💖 xx

  31. July 1, 2018 / 10:04 am

    I’ve loved baking for a while now! I make a lot of cup cakes but this cake looks so good! Iv always wondered if it’s really difficult to make a rainbow cake but you make it look really simple! Great post x

    • July 1, 2018 / 3:06 pm

      Thanks Aaliyah! 💖 I was impressed at how simple this was to make and tasty too! Glad you enjoyed the post lovely 😘 xx

  32. Jess
    July 1, 2018 / 10:09 am

    I absolutely love cake I’ve got such a sweet tooth and this looks so nice!! I don’t do much baking but it sounds super simple too, thanks for sharing will definitely keep my eye out for this!

    Jess //

    • July 1, 2018 / 3:12 pm

      Thanks so much Jess! 💖 It’s such a perfect kit for those who don’t do much baking, I was really impressed with the results 😍 xx

    • July 2, 2018 / 12:56 pm

      Thanks Lainy! 💖 It was really fun and easy to do. I’d definitely recommend trying one 😍 xx

  33. July 1, 2018 / 11:50 am

    This is such an adorable cake! I barely ever bake but this seems like an easy-to-follow recipe 🙂 xx

    • July 2, 2018 / 1:04 pm

      Thanks Faye! It’s such an easy one to follow 😍 xx

    • July 2, 2018 / 1:12 pm

      Thanks Zoe! 💖 I never knew about the kits either but now I’d definitely recommend them! 😍 xx

  34. July 1, 2018 / 3:13 pm

    You did such a good job. That looks so tasty and makes me want to have cake now 😂🙈 I think we all need a blogger meet up and you this cake needs to happen again. Definitely did a better job than I would have done haha! I hope you are having a lovely Sunday. Thank you for sharing! Xxx

    • July 2, 2018 / 5:29 pm

      Aw thank you so much Lauren! 💖 That’s a brilliant idea, a blogger meet up with lots of rainbow cake 🍰🌈😍 I’m definitely up for this idea! Glad you enjoyed the post lovely and hope you had a nice weekend 😘 xx

  35. July 1, 2018 / 3:33 pm

    This is so cool, well done! I wouldn’t say I’m a fantastic baker but I’m not horrible either. I’ve thought about doing a rainbow cake in the past but they have always looked so difficult so this sounds like it would be a good option. Thanks for sharing, I’d never heard of this brand before so I will look out for them the next time I want to whip something up!

    Sneha |

    • July 2, 2018 / 5:32 pm

      Thanks Sneha! 💖 I’d definitely recommend this brand, they make baking so much easier and the results are pretty tasty too! 😍 xx

  36. July 1, 2018 / 4:27 pm

    I have always loved the rainbow desserts I have seen. There is just something so bright and cheerful about them. I have a feeling my 6 year old would love this as she is forever drawing rainbows. Brilliant that it comes in a kit like this!

    • July 2, 2018 / 5:55 pm

      Thanks Kristin! 💖 Glad you enjoyed the post! The kit is so handy and makes it really easy to create. Hope your daughter enjoys it! 😘 xx

  37. Pushpanjali Roy
    July 1, 2018 / 5:20 pm

    Thanks for sharing this post, the kit seems to be godsend for a terrible baker like me. I’ll try baking a rainbow cake next weekend!


    • July 2, 2018 / 6:01 pm

      Thanks so much Anjali! 💖 That’s awesome, I hope you enjoy making the cake at the weekend 😘 xx

  38. Louisa
    July 1, 2018 / 6:39 pm

    This is a great idea. I love that they’ve included a conversion chart too, that’s so handy. I hate having to google all the conversions.

    Louisa |

    • July 2, 2018 / 6:16 pm

      Thanks Louisa! It’s definitely a handy kit, they have thought of everything 😍 xx

  39. Shan
    July 1, 2018 / 8:14 pm

    Ooer this looks a bit of a challenge 😂 I made a huge rainbow cake for my daughters birthday last year and this looks a lot neater than the Armageddon in my kitchen Bexa 😂 must try it soon!

    • July 2, 2018 / 6:27 pm

      He he, thanks Shan! 💖 I’m not sure I could make this without the kit so well done at making your own, I bet you did an amazing job! 😍 xx

  40. July 1, 2018 / 8:46 pm

    Yummy! Why so shocked it worked?

    I love to bake, cakes, cookies, bread, my hips likes me to bake to! Lol

    • July 2, 2018 / 6:40 pm

      Thanks Jen! 💖 Yum! I’d love to be able to bake cookies 😍. I was shocked it worked as I’ve never really baked anything before and the layers came out the oven brown when I thought they should be colourful he he 🙈😂 xx

  41. July 2, 2018 / 8:53 am

    Woah, I love how simple and fun this recipe is! Having a rainbow kit definitely makes it less complicated! Thanks for sharing 🙂

    G. x

    • July 2, 2018 / 6:49 pm

      Thank you so much lovely! 💖 So glad you enjoyed the post! A kit definitely makes it all so much easier 😍 xx

  42. July 2, 2018 / 9:01 am

    Omg this cake looks amazing! I’ve been loving baking lately and this looks so good. Definitely saving this post and coming back to it when I’m fancying some cake – thanks for sharing! X

    Evie x |

    • July 2, 2018 / 6:51 pm

      Thanks so much Evie! 💖 Hope you enjoy making it when you fancy some cake! 😍 xx

    • July 2, 2018 / 6:55 pm

      Thank you so much! 💖 xx

  43. July 5, 2018 / 5:34 pm

    I had no idea you could buy kits like this, they’re so good for non-bakers! I’ve tried baking a rainbow cake a couple of times, the first time was terrible because I put so much food colouring into the cake mix it just didn’t cook well or taste nice. Another time I made one for my mam’s birthday in a sort of pink-purple gradient and that turned out so much better!

    Em ~

    • July 5, 2018 / 6:51 pm

      Ooh a pink-purple rainbow cake sounds awesome! I imagine they are hard to make without a kit. I’m not sure I could do it 🙈. You did really well to do it yourself Em 💖 xx

  44. Huda
    July 5, 2018 / 8:19 pm

    This is so amazing, I have always wanted to try a rainbow cake but given my history with baking I was most probably going to mess up haha! I love these baking kits, definitely something some one like me could use! Love how your cake turned out btw! 😍🙌🏼

    • July 6, 2018 / 2:05 pm

      Thank you so much Huda! Baking kits make things so much easier! Glad you liked the post lovely 💕😘 xx

  45. September 23, 2018 / 9:26 am

    This cake looks yummy and so easy to make. I haven’t heard of this brand before but I love they’re attention to detail with the cake boards and the conversion charts. I haven’t seen this in offering baking kits before.

    • September 25, 2018 / 5:26 pm

      Thank you so much Kim! 💖 It’s such a great kit and really makes life easier 😍 xx

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