Chocolate and peanut butter snack cakes

INGREDIENTS

unsalted butter 200g, softened, plus extra for the tin

100 g

caster sugar

100 g

soft light brown suagr

eggs 3, lightly beaten

185 g

self-raising flour

1/2 tsp

baking powder

40 g

cocoa powder

3 tbsp

whole milk

egg whites

80 g

caster sugar

80 g

soft light brown sugar

unsalted butter 200g, cubed

125 g

smooth peanut butter

dark chocolate 500g (65%-75% cocoa content), chopped

rainbow sprinkles to decorate