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How to make the Best Ever Rainbow Cake | Cupcake Jemma

There isn’t a person on earth who isn’t a fan of rainbows, right? Right?? Well, if there is then they must be very sad and lonely. But you and I know that rainbows are magical and brilliant and what better way to give the rainbow the respect it deserves than to embody it in cake form.

This one’s quite a lengthy watch, so put the kettle on, put your feet up and prepare for some top tips for baking and decorating the perfect Rainbow Cake. This video is going to knock your socks off!


For the cake –
9 tbsp whole milk
1 ½ tsp vanilla extract
Various colour pastes (red, orange, yellow, green, blue & purple)
750g soft unsalted butter
750g caster sugar
9 large free-range eggs
750g sifted self-raising flour
Butter & flour for preparing the cake tins

For the buttercream –
400g soft unsalted butter
900g sifted icing sugar
5-6 tbs whole milk
½ tsp vanilla extract




  1. Stephanie Davis says:

    So much cake waste ah !

  2. Mark Hales says:

    Wow these look amazing

  3. Olukemi Dada says:

    This is awesome I make one of your recipe's every week and also this is my sisters laptop I am olutomi

  4. Ekrem Tursun says:

    This is the hardest (how to make a rainbow cake) video what was that omg I don't wanna make any rainbow cake after I watch this

  5. Mitchell Robless says:

    we do not want that floor sparying everywere

  6. emzy ducklover says:

    preping for 2020 pride month

  7. Naz Kauser says:

    I was going to make a rainbow cake and came across your video for inspiration. After looking at your rainbow cake, I gave up! You need too many eggs and equipment lol. But you made a very good cake.

  8. Glendhel Joy Etulle says:

    It's look like the Rainbow Cake of Bless Roll Cafe😍 love it💝

  9. Manish Singh says:

    why has she cut of half the cake just remove the camrelised bit

  10. Timera Walters says:

    How are u cracking the eggs so perfectly u must have practice Soo hard😂

  11. Asad Hussain says:

    Muy bien

  12. Maileen Madera says:

    Hi. Can I just ask what is the brand of you colour paste?

  13. Andrea B says:

    No one has an oven big enough for all of those tins at once….

  14. AJ Gaming says:

    Im not actually impressed because you didnt use glover while making the cake😔😔😔so im going to give it 6/10

  15. Paulina Ruiz says:

    I’m legit gonna go tell my dad rn let’s go to the store and buy all the ingredients

  16. Voiceless Snowman says:

    Followed this recipe to a T and came out amazingly perfect. I wish I could post the pictures. The great thing about this recipe is it’s not too sweet.

  17. Fiona Joice says:

    Hiya Jemma, I only have 6 inch tins instead of 8 inch… should I alter my mixture measurements incase my tins are too small for the batter?

  18. Name Name says:

    What gels should we use that are vegetarian friendly? Mine are so pale 🙁

  19. kate andress says:

    Rainbow is beautiful but those icing edges make my brain happy 🙂

  20. Blancita Chapeton says:

    Que es harina tamizada de crianza automática

  21. mukesh nayak says:


  22. Gemma Donohoe says:

    I only have 9 inch cake tins, do I have to adjust the amount of cake mixture? 🧐🧐🌈🌈🌈

  23. cloudywhite says:

    Thx to you, I did it ur way for my husband birthday , it's delicious 😋
    But if you can tell me another way to decorate it instead of butter cream, I 'll be thankful
    Greetings to you

  24. Marie claire Bellanton says:

    so queit and relaxing*

  25. Random Stuff says:

    This was 6 years ago wow

  26. Frankie Shannon says:

    No just like who can eat an entire one of those 😀😀😀

  27. fatima shah says:

    Took me about 3 hours to make but it was so worth it! Tasted incredible, stayed fresh for 3 days and looked beautiful! I also followed Jemmas video on how to cover your cake with sprinkles, added some colour and texture to the side of my cake – big hit!!

  28. XxellieX x says:

    Hi I love your channel but I was just wondering how you change the level of the cake level I have one and I can’t work Out how to change the the size of it ☺️🤪

  29. Jovy Hagad says:

    I think i love you now huhuhu

  30. Nooriina Toorab says:

    Hello, is it ok to bake the cake one day before and then do the frosting day after? How do i preserve the cake? Do i need to moisten it with syrup if i do it a day before? Please advise. Thanks.

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