Adam turned 3 & with the influence of 2 older sisters he requested a strawberry unicorn cake for his birthday.  Now I am definitely not a cake maker/decorator but thought I would share my baking with you.

If you asked him if he liked his cake (and indeed asked all my kids) the answer was yes, they loved it.  If I were to think along the lines of Pinterest perfect it would definitely be a slight fail.  Do I care?  No, not really as the kids were happy, it tasted great and that means I’m happy!!

I’ve made this rainbow cake before, it’s heavy on the food colouring but I don’t think having it just at birthdays is too much of an issue.

Use food colouring paste if you want a vibrant colour!

The pastes last a long time as only a little is needed so it’s well worth the investment.  They are also great for playdough too!


Sunny Buttercups


150g butter/margarine
55g coconut oil
215g caster sugar
2 teaspoon vanilla extract
4 eggs
365g plain/all purpose flour
4 teaspoon baking powder
160g unsweetened full-fat yoghurt (I use creamy Greek yoghurt)
80g full fat milk
Food colouring paste of your choice


I used an electric food whisk, (but it can be done in a mixer or by hand) beat the butter and sugar until pale and smooth.

Beat one egg at a time to the butter and sugar mixture.

Add the coconut oil (melted/liquid), milk and yoghurt and beat briefly to combine.

Sift flour into a bowl with baking powder and stir to combine before adding to the cake batter.  Combine the flour using a spatula in a folding motion.

Next, split your cake batter in half, so half in one bowl and half in another so your two cake pans will end up being a very similar size before dividing quantities into your colours.

cake batter in dishes split for rainbow cake recipe

Now for the time-consuming part:
I used 6 colours for my rainbow cake and each cake tin will have the same colours but reverse order.

The first colour will be the largest, then gradually getting smaller over the number of colours that you use.

As the cake batter at this stage is not coloured it’s easier to divide the mixture into the 6 bowls with decreasing amounts of batter so the last bowl will be the smallest, the first bowl, the largest portion.

Now mix in the food colouring into each portion, I found the food colouring paste mixed very easily using a spatula.  Make sure you wash your spatula inbetween colours.

Add the largest colour first, tap the tin on the work surface to allow spreading of the mixture each time you add a layer in the centre of the tin.

I used an 8″ cake tin which was greased and lined with paper (also greased).

rainbow coloured cake batter one tin recipe directions

Repeat the process for the second cake pan but in the reverse colour order.

one pan rainbow cake recipe instructions

Bake in a preheated oven, Gas mark 4, 180°C, 350°F, Fan 165°C for 25-30mins (skewer test).

Once fully cooled, I filled with a strawberry buttercream, and then made my best attempt at creating a unicorn to fulfil my son’s wishes.

rainbow unicorn birthday cake

This recipe is not my usual cake recipe but works really well at not having the colours bleed into each other so this is my birthday cake rainbow go to recipe.  It tastes amazing and has a lovely texture too.



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