Baking · serves 2

Rainbow Cake

Six thin coloured layers. Entirely unnecessary and children lose their minds.

90 min A proper cook Vegetarian

Ingredients

  • 500g plain flour
  • 400g sugar
  • 4 tsp baking powder
  • 1 tsp salt
  • 480ml milk
  • 2 tbsp apple cider vinegar
  • 200ml sunflower oil
  • 2 tbsp vanilla extract
  • Six food colourings
  • Frosting: 300g butter, 600g icing sugar, 4 tbsp milk

Method

  1. Milk and vinegar, 5 minutes.
  2. Sift flour, sugar, baking powder and salt, then add soured milk, oil and vanilla.
  3. Weigh the batter and divide it into six equal bowls. Weigh — eyeballing gives you uneven layers.
  4. One colour per bowl.
  5. Bake each in a greased 20cm tin, 180°C for 12-15 minutes. They are thin and cook fast.
  6. Cool completely and level each layer flat.
  7. Beat the frosting until very pale, then stack with a thin layer between each.
  8. Cover the outside, chill 30 minutes, then a second coat for a clean finish.

Questions people ask about Rainbow Cake

How long does Rainbow Cake take?

About 90 minutes from starting to sitting down, and it is a proper cook. A good part of that is unattended, so you can get on with something else once it is going.

What can I use instead of maida in Rainbow Cake?

Use plain atta for a denser, nuttier result, or a 50/50 mix if you want to keep some lift.

Can I make Rainbow Cake ahead of time?

You can prepare it a few hours ahead and reheat gently. It keeps two days in the fridge, though it is best on the day.

Is Rainbow Cake vegetarian?

Yes, it is vegetarian. It is not vegan as written because it contains dairy; swap the dairy for a plant alternative and the rest of the method is unchanged.

Do I need an oven for Rainbow Cake?

Yes, this one needs an oven. If you do not have one, look at the no-oven filter on the baking page: eleven of the bakes here are built for a cooker, a pan or the fridge.

What do you serve with Rainbow Cake?

On its own, warm, with tea or coffee. Baking is chemistry, so scale it by weight rather than by eye: double every quantity, use a tin with roughly double the area, and expect to add ten minutes or so. Judge it by the skewer, not the clock.

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