Great British Bake Off: Hot chocolate birthday cake

This warmly spiced cake is reminiscent of a cup of Mexican hot chocolate.

Great British Bake Off: Hot chocolate birthday cake

Great British Bake Off: Hot chocolate birthday cake This warmly spiced cake is reminiscent of a cup of Mexican hot chocolate. Print This
Serves: 12
Nutrition facts: calories fat
Rating: 3.8/5
( 4 voted )


  • 75g cocoa powder
  • 375g caster sugar
  • 375ml boiling water
  • 200g unsalted butter
  • 3 large eggs
  • 335g plain flour
  • 1 1/2 tsp baking powder
  • 1 1/2 tsp bicarbonate of soda
  • 2 tsp ground cinnamon
  • 1/2 tsp ground nutmeg
  • 1/4 tsp ground cayenne
  • For the filling
  • 225g unsalted butter
  • 450g icing sugar, sifted
  • 75g cocoa powder
  • 1/2 tsp ground cinnamon
  • 4-5 tbsp whole milk
  • For the decoration
  • 300ml double cream
  • Mini marshmallows
  • 10g 70% dark chocolate, grated
  • Ground cinnamon


  • Heat the oven to 180°C. Grease 3x20cm round cake tins and line with baking paper. Put the cocoa powder, 150g of the caster sugar and the boiling water in a jug and whisk together until the sugar has dissolved. Set aside to cool slightly.
  • Cream the butter and remaining caster sugar together until pale and fluffy, then add the eggs, one at a time, beating well between each.
  • Sift the flour, baking powder, bicarbonate of soda, cinnamon, nutmeg and cayenne together in another bowl. Add   of the flour mixture to the creamed butter and sugar, and beat well to combine. Repeat twice more, using   of the flour mixture each time and beating well between each addition.
  • Fold in the cocoa and sugar mixture until fully combined. Divide the cake batter equally between the 3 lined tins and bake for 25–30 min, until risen and a skewer inserted into the centre comes out clean.
  • Remove the cakes from the oven, leave to cool in the tins for 5 min, then turn out onto wire racks. Peel off the paper and leave to cool.
  • Whisk all the filling ingredients together, until light and aerated. Divide the mixture into 3 equal portions, using 2 portions to sandwich the cakes together and the third to cover the top and sides.
  • To decorate, whip the cream to firm peaks, then spoon it into a large piping bag fitted with a large star nozzle. Pipe swirls of cream over the top of the cake, then sprinkle with mini marshmallows and the grated chocolate, and dust with cinnamon.

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