The Amazing Rainbow Cake

There could be many things said abut raising your children whilst running a restaurant / bakery. Long hours , sore and tired mommies and daddies and busy weekends. There are of course upsides and one of those includes getting kick-ass birthday cakes. Here’s a recent hit amongst our kids and their friends. It is an audacious and time consuming project but one with a big rewards. You’ll need at least 7 bowls and 7 pans for each coloured batter and a big oven. That said relax and have fun and try to get the kids involved but add 2 hours if you do ;-) !

Love Kyla





2 blocks / 500 g softened unsalted butter

3 cups / 675 g castor sugar

8 egg whites (room temperature)

4 tbs vanilla

3/4 cup / 165 g raps or sunflower oil

5 cups / 640 g flour

4 1/2 tsp baking powder

1 1/2 tsp salt

2 cups / 490 g milk (room temperature)

You’ll need rainbow colours food colouring or if you feel confident about colour mixing, primary colors .


2 blocks / 500 g softened unsalted butter

4 cups / 500 g confectioners sugar (sifted)

3/4 cup / 170 g cream cheese (room temperature)

1 tsp vanilla

2 tbs cream



Butter and line the bottom of seven 25 cm round cake pans with baking paper and set aside.

Pre-heat oven to 175ºC.

Beat the butter and sugar for 5 minutes until light and fluffy.

Add the egg whites, vanilla and oil and continue beating for another 2 minutes.

In a separate bowl whisk the flour, baking powder and salt.

Add the flour mixture to the wet mixture in 3 parts, alternating with 2 parts milk.

Divide the bater evenly into 7 bowls.  It is about 375 g per bowl.

Colour each of the bowls of batter a different colour of the rainbow:  

red, orange, yellow, green, blue, purple, pink

Start with only a few drops of food colouring as some are quite strong.  You want to achieve pastel colours that are on the same colour palette.  i.e..  they need to match each other.

Spread the batter into each of the prepared pans.

Arrange pans in the oven and bake for 15-20 min. rotating arrangement halfway through.  The cake layers are finished baking when a toothpick comes out clean.


Beat ingredients until light and fluffy.

Remove cake layers from the pans and trim the edges.

Begin frosting and assembling each layer with frosting in between.  Keep in mind the order of the colours of the rainbow.  red, orange, yellow, green, blue, purple, pink

Frost a thin layer on the outside so that the colours can still be seen.

Refrigerate uncut for up to 5 days.

Remove from fridge one hour before serving.

RecipiesKyla Boyle