Doesn’t this cake just make you happy? I really wasn’t expecting this cake to taste anything special, as at first I actually forgot to add the eggs… ooops! So it’s a miracle this cake even worked as I added them at the end! But OMG it really was Delicious!!
The most important thing to remember when creating a rainbow cake is patience! Its six cakes in one so it can be very time consuming – not ideal with a crawling hooligan! So I bought extra cake tins (18-20cm), so it would speed up the process.
The layer cakes are just standard vanilla sponge, but the taste is really in the frosting. Using just regular icing sugar and Stork Butter, I added freshly squeezed orange juice into the Mixer, It really gave it that kick it needed, and gave it that WOW taste it was missing!
For the six layers of cake: You need to divide the below measurements by 6 to bake each layer individually.
530g plain flour
6 tsp baking powder
3/4 tsp salt
4 tsp pure vanilla extract
600g caster sugar
6 eggs (at room temperature)
Food colouring – I used Dr Oetker food colourings
For the Orange icing: You may need extra depending on how much you decide you want to use.
800g Icing Sugar
The juice from one large orange
Preheat oven to 180°C (350°F) and grease up your cake tins using baking paper and butter. Combine your flour, baking powder and salt in a medium bowl and pop to one side. Then mix the milk and vanilla together in a measuring jug or bowl.
Using an electric mixer on low speed, mix the sugar and butter until blended, increasing the speed slowly to create a pale and creamy effect – at least 5 minutes of mixing! Reducing the speed – ADD THE EGGS !!! One at a time, then add the flour mixture, followed by the milk and vanilla.
When smooth, divide evenly into six separate bowls and add the food coloring. Once all colored, pour the batter into the already prepared cake tins and pop in the oven for 20 minutes. Over baking can run the risk of your cake tasting like sawdust! So keep a close eye on your rising cakes.
You need to cool the cakes on a wire rack for at least an hour, but once completely cooled the fun can really start!
Preparing the icing is simple; mix the butter and icing sugar in the mixer until smooth and fluffy. Reduce the speed and squeeze your orange into the mix, the amount you squeeze is totally up to you, I liked the tangy taste so squeezed the lot in! But be careful not to drop any pips into the mixer. The icing should be smooth and easily spreadable, but stiff enough to hold its shape.
To assemble the cake; If like me you like the ‘rustic’ look, you don’t need to bother with the below instructions, Just use your common sense and build the sponge on top of each other with a layer of frosting in-between each level, and ta da you have yourself a rainbow cake! But if you want a neat presentation you need to follow the guidelines. Using a long knife, trim the cake to make the sponge level all the same size. Place the purple layer, on your cake plate/stand, and spread a thin layer of icing over the top with a spatula. Repeat with the blue, green, yellow, orange and red layers.
Using the same icing mix (you may need to make extra) frost the cake all around the outside, and add the decoration of choice. Jelly beans, smarties and m&m’s seem to be popular.
So there you have it, a delicious but a little bit ‘rustic’ rainbow cake.