Diet Coke chocolate cake

Indulge in this tea time treat

Diet Coke Chocolate Cake

Makes: 12 slices

Preparation time: 15 minutes

Cooking time: 40 minutes


250g self-raising flour
45ml (3 tbsp) cocoa powder
5ml (1 tsp) bicarbonate of soda
150g soft brown sugar
150g butter
200ml Diet Coke
150ml buttermilk
2 medium eggs
5ml (1 tsp) vanilla extract

For the frosting:

100g plain chocolate (70% cocoa), broken into pieces
45ml (3 tbsp) Diet Coke
45ml (3 tbsp) buttermilk


  • Preheat the oven to 180°C, gas mark 4. Grease a 20.5cm loose-bottomed, spring release cake tin and line the base with baking paper.
  • Sift the flour, cocoa powder and bicarbonate into a bowl. Stir in the sugar.
  • Put the butter in a saucepan and melt over gentle heat. Add the Diet Coke to the butter and stir to mix, making sure mixture does not boil. Remove from the heat.
  • Beat together the buttermilk, eggs and vanilla extract.
  • Quickly whisk the cola mixture into the dry ingredients, then whisk in the buttermilk mixture. Mix gently but thoroughly.
  • Pour the mixture into the prepared tin. Bake for about 40 minutes or until a skewer inserted into the centre comes out clean.
  • Leave to cool in the tin for about 15 minutes, then turn out onto a cooling rack.
  • To make frosting, place the chocolate and Diet Coke in a saucepan. Cook over a gentle heat, stirring until the chocolate has dissolved. Remove from the heat and stir in the buttermilk. Place the cake on a plate and spoon over the chocolate mixture. Allow to set.

Nutritional info per slice:

Calories Sugars Salt Fat Saturated fat
282kcal 18g 0.8g 15g 8.8g

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