Gluten Free Rainbow Cake…

Fancy making this Gluten Free Rainbow Cake?

(Dairy + Gluten Free) Guest post from Delicious Alchemy.

What better way to celebrate than with a rainbow?

Grab yourselves a couple of bags of our Vanilla Sponge mix, and bake yourself a gluten free Rainbow Cake – perfect for any occasion!

Serves: 24 slices Prep Time: 20 mins plus 30 mins for decorating

Cooking Time: 1 hour

What you need:

  • 2 x bags of Delicious Alchemy Vanilla Sponge mix
  • 2 x 7 inch cake tins
  • 6 large eggs
  • 810g butter (or dairy free alternative)
  • 40ml water
  • 1kg icing sugar
  • 1 tsp vanilla extract
  • ½ tsp Wilton icing colours (we recommend red, pink, golden yellow, leaf green, royal blue & violet)

Top tip: for a smaller cake, use half of the ingredients stated above with 6 inch tins instead!

What you do:

Step 1

Pre-heat your oven to 180°C (160 °C Fan assisted)/Gas Mark 4. Grease and line the bases of your 7 inch cake tins. Place both cake mixes into a mixing bowl along with 360g of soft butter (or dairy free alternative), 6 eggs and 40ml of water. Using an electric mixer, mix the ingredients for 15 seconds. Then stop, scrape down the sides of the bowl with a spatula and mix again for another 10 seconds.

Step 2

Divide the mix equally into 6 bowls, adding ½ a teaspoon of Wilton colouring into each bowl – you should have six different coloured bowls all together.

Step 3

Pour two of the bowls into two of your cake tins, and bake for 18-20 minutes. Before you take the layers out of the oven, check that the cake is golden brown, or insert a skewer into the centre of the cake and check it comes out clean. Once out of the oven, leave the cakes to cool for 5 minutes before you take them out of the tins. Repeat this step with the rest of your bowls until all 6 layers are baked.

Step 4

Mix the remaining 450g of butter (or dairy free alternative) with the icing sugar and the vanilla extract in a bowl until thoroughly mixed. Place the violet layer of the cake onto the base of a cake board or large plate, then spread some of the icing over the top with buttercream. Place the blue cake layer on top of this, and repeat the process following the order: violet, blue, green, yellow, pink and red. Or alternatively, you could mix it up! Once all the cakes have been layered with buttercream, cover the rest of your cake with the remaining buttercream.

*Recipe and recipe photography by Delicious Alchemy*

*No Payment was received*


Hi, I am Claire and I created Claire Justine in 2011. I hope you enjoy reading my posts as much as I love writing them. Please leave a comment below and share your thoughts with us.



  1. Julia Nyanyo
    September 18, 2016 / 9:40 pm

    I love these rainbow cakes, I've never tried making one though. I'm not sure how to get the bright colour in the cake mix like this. We used to made green cakes for halloween when the kids were small but they were pale (we used to call them mouldy cakes!) I'm wondering if this Wilton colouring is the way to getting the bright colour, or maybe I just never added enough!

    • Clairejustine oxox
      September 19, 2016 / 3:59 pm

      Thank Julia, I know what you mean, I remember making some Halloween cakes and they turned out pink. I think I did not use enough in mine. This is a guest post and I 've not used the Wilton colouring yet, I will have to look out for them and let you know 🙂

  2. Tamar SB
    September 18, 2016 / 10:16 pm

    So pretty!!

    • Clairejustine oxox
      September 19, 2016 / 3:59 pm

      Thanks for the comment Tamar 🙂

  3. Mellissa Williams
    September 19, 2016 / 8:23 am

    That cake looks so impressive, what a show stopper, you need to be on Bake off. I'm impressed that it's gluten free and diary free too

    • Clairejustine oxox
      September 20, 2016 / 8:40 am

      Thanks Mellissa, it is an amazing cake 🙂 I did not make it though 🙁 it is a guest post.. Would love to go on Bake Off though 😉

  4. Dean B
    September 19, 2016 / 11:48 am

    I love rainbow cake and would love to make one for my daughter, however it looks a bit too complicated for a newbie baker like me. Might just give this a go!

    • Clairejustine oxox
      September 20, 2016 / 8:42 am

      Thanks Dean 🙂

  5. Heather{Our Life In a Click}
    September 19, 2016 / 1:47 pm

    This is the prettiest cake!

    • Clairejustine oxox
      September 20, 2016 / 8:43 am

      Thanks for stopping by Heather 🙂

  6. Joanna Victoria -x
    September 19, 2016 / 2:06 pm

    I love rainbow cakes they always look stunning. I've never made one myself but not much of a baker anyway.

    • Clairejustine oxox
      September 20, 2016 / 8:47 am

      Thanks for the comment Joanna :):)

  7. Coffeeandbubbles
    September 19, 2016 / 3:29 pm

    Wow! That looks amazing and you make it sound really easy!

    • Clairejustine oxox
      September 20, 2016 / 8:49 am

      Thanks for stopping by 🙂

  8. Cathy
    September 19, 2016 / 5:54 pm

    This looks so good. Would be great for the Macmillan coffee morning we are holding x

    • Clairejustine oxox
      September 20, 2016 / 8:57 am

      Thanks Cathy, whoo sound like a fun event 🙂

  9. Vai Chin
    September 19, 2016 / 8:18 pm

    That looks very delicious and so pretty! I am so going to try this out.

    • Clairejustine oxox
      September 20, 2016 / 8:59 am

      Thanks Vai 🙂

  10. Jayne SMABL
    September 20, 2016 / 8:41 am

    We love rainbow cake! My husband makes a mean one. This looks delicious 🙂 x

    • Clairejustine oxox
      September 22, 2016 / 7:35 pm

      Whoo sounds lovely Jayne :):)

  11. Laura Hartley
    September 20, 2016 / 12:15 pm

    Wow so gorgeous! My boyfriend's sister is gluten free and I'm sure she'd love this 😀

    • Clairejustine oxox
      September 22, 2016 / 7:38 pm

      Thanks for the comment Laura 🙂

  12. beautyqueenuk
    September 20, 2016 / 12:28 pm

    This just looks so impressive and the colours inside are so bright x

    • Clairejustine oxox
      September 22, 2016 / 7:40 pm

      Thanks for stopping by Rachel 🙂

  13. Kara Guppy
    September 20, 2016 / 5:49 pm

    OMG that looks amazing, I have always wanted a rainbow cake

    • Clairejustine oxox
      September 22, 2016 / 7:42 pm

      Thanks for the comment Kara 🙂

  14. Alina
    September 20, 2016 / 7:28 pm

    What a delight! I am definitely making this for my sisters husband who eats gluten free. I've also pinned your sugar photo onto my food photography Pinterest board – hope you don't mind :)Alina's Pinterest board | FPP #Food #Photography

    • Clairejustine oxox
      September 22, 2016 / 7:43 pm

      Thank you Alina, aww thank you.. No I don't mind :):)

  15. Create With Joy
    September 25, 2016 / 1:28 am

    I skipped my birthday cake this year – now I am seriously rethinking that decision!This looks amazing – thanks for sharing it with us at Inspire Me Monday at Create With Joy – I am definitely featuring this recipe this week! 🙂

    • Clairejustine oxox
      September 26, 2016 / 12:39 pm

      Thanks for hosting, stopping by and the feature lovely 🙂

  16. Debbie-Dabble Blog and A Debbie-Dabble Christmas
    December 9, 2016 / 2:13 pm

    Claire, Now that is one festive and yummy looking cake!!Thanks so much for all your visits and sweet comments!!Hugs,Debbie

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