Rainbow cake recipe | Good Food

Ingredients

• 125g butter softened, plus a little extra for the tin
• 225g self-raising flour
• 150g golden caster sugar
• 3 medium eggs (very important to use the correct size)
• 1 tsp baking powder
• pinch of salt
• 1 tsp vanilla extract
• 1 tbsp milk optional if batter is too stiff
• edible food colouring - red, orange, yellow, green, blue and purple, plus optional pink (see below)
• 750g soft cheese or mascarpone
• 350g icing sugar