It's final's week in the Great British Bake Off and everyone will have to cook a cake. We have this exclusive Bettys chocolate fudge cake recipe for you to try at home.

  • 60mins
  • 8
  • Easy


  • 55g cocoa powder
  • 125ml boiling water
  • 185g butter, softened
  • 300g soft brown sugar
  • 3 eggs (medium), beaten
  • 1 tsp vanilla extract
  • 175g sour cream
  • 200g plain flour
  • ½ tsp baking powder
  • ¼ tsp bicarbonate of soda
  • Fudge frosting:
  • 150g butter, softened
  • 100g icing sugar
  • 100g dark chocolate


To make the chocolate fudge cake: Preheat the oven to 160°C (fan assisted). Grease and line the base of 2 x 18cm sandwich cake tins with baking parchment paper.

Mix the cocoa powder with the boiling water to a smooth paste. Set aside to cool.

Cream the butter and soft brown sugar in a large mixing bowl. Gradually add the beaten eggs. Do not add too quickly or the mixture will curdle.

Add the prepared cooled cocoa paste, vanilla extract and sour cream to the creamed mixture and mix well.

Sift the flour, baking powder and bicarbonate of soda together and carefully fold into the creamed mixture.

Divide the mixture between the two tins. Bake in the preheated oven for 35-40 minutes, until firm to the touch. A skewer inserted into the middle of the cake will be clean when the cake is cooked.

Leave in the tin for 10 minutes before turning onto a wire rack to cool.

To make the fudge frosting:

Melt the chocolate in a bowl over a pan of simmering water. Stir until all the chocolate has melted. Remove from the heat and allow to cool to body temperature.

In a separate bowl, cream together the butter and icing sugar with an electric mixer until creamy. Gradually incorporate the cooled melted chocolate into the creamed mixture.

Once the chocolate fudge cake has cooled completely, sandwich the two cakes together with a third of the fudge frosting. Top the chocolate fudge cake cake with the remaining frosting.

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