Lisa’s Magical Rainbow Cake

Look at those colours and tell me it’s not magical!
… ok, so maybe this cake doesn’t contain any fairy dust, but it sure is tasty. And a massive hit at any birthday party, for young and old! (I served this at a student flat party and everybody loved it, so don’t anyone go telling me it’s for kiddies only…)

However, making this cake was incredibly time-consuming because I only had 1 cake tin to work with. Yeah. I have loads of cake tins, but all different sizes. I suggest you take about one afternoon to make this if you have several tins of the same size, or make 2 layers a day and after three days, you should be done (that’s how I did it). 

Ingredients (for one layer):
225g vegan margarine
225g self-raising flour*
225g brown sugar
100-150ml soya milk, to loosen the batter
3 flaxseed “eggs”: 3 tbsps ground flaxseed + 9 tbsps water
colouring agent (for the colours of the rainbow: yellow, orange, red, green, blue, purple)
ready-made vanilla buttercream icing (1 pot)
* I used self-raising flour but in the end, with six layers, the cake was enormous and really heavy (and I had to carry that thing to a party!). To create thinner layers, use plain flour with no baking powder. 
1. Grease a round cake tin and preheat the oven at 180ºC. 
2. With an electric mixer (or a spoon, if you want to work in some exercise), cream the ‘butter’ and sugar. Add the flour and mix well. The batter will become a bit too try, so gradually add soya milk to loosen, but be careful not to make it too runny: a sponge cake batter needs to be thick. 
3. In a small bowl, combine 3 tbsps of ground flaxseed and 9 tbsps of tepid water. You can heat it in a pan if you want it to jellify, but that’s not necessary. Add this mixture to the batter and combine well. 
4. Choose the colouring agent. I made six layers for this cake, in this order from top to bottom: red, orange, yellow, green, blue, purple. You can add indigo if you like.
5. Pour the batter into the cake tin and bake for 35 mins. 
6. When you have assembled all six/seven layers, trim the cake to make sure the layers are all sitting perfectly evenly on top of each other. Cover the whole cake with the buttercream icing. Chill in the fridge or in a cool place.
See how big it is compared with the cat?

When you serve the cake, each slice will reveal a rainbow. Surprise effect guaranteed! 

This cake is named after Lisa, the birthday girl I gave this cake to. Happy birthday Lisa 🙂

— Clem

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