Simple Chocolate Traybake

This chocolate cake is light, fluffy and an absolute dream, perfect for quickly whipping up for a kid’s party. The frosting is light as air and altogether feels like a proper treat. Not just for kids, personally, I’ll decorate anything in Smarties…

Simple Chocolate Traybake


115g plain flour
40g cocoa
150g caster sugar
1 tsp baking powder
1/2 tsp bicarbonate of soda
pinch of salt
90ml sunflower oil
1 egg
90ml milk
75ml just-boiled water


60g unsalted butter
60g icing sugar
10g cocoa
1 tbsp warm milk
pinch of salt


  1. Preheat your oven to 180°C/160°C fan/gas mark 4 and line an eight inch baking tin with baking paper or reusable liner.
  2. Combine the flour, cocoa, sugar, baking powder, bicarbonate of soda and salt in a bowl.
  3. In another bowl, beat together the oil and eggs.
  4. Add the milk to the wet mixture and combine.
  5. Pour into the dry flour mixture and mix.
  6. Add the just-boiled water and mix until well combined.
  7. Pour into your tin and bake for 25 to 30 minutes until a toothpick comes out clean.
  8. Leave it to cool in the tin for five minutes before transferring to a cooling rack and leaving to cool completely before icing.


  1. Beat the butter with a hand or stand mixer for a few minutes, until pale.
  2. Add the icing sugar and cocoa carefully and mix.
  3. Pop in the milk and pinch of salt and beat for two minutes on high speed.
  4. Spread onto your cooled cake and add any decoration you like – Smarties, sprinkles, chocolate chunks… whatever takes your fancy!
  5. Cut up and enjoy.


Adapted from Waitrose