Double fudge cake with chocolate buttercream frosting

  • Preparation Time30 mins
  • Cooking Time30 mins
  • Serves18
  • DifficultyEasy
220g unsalted butter, at room temperature, plus extra for the tin
450g plain flour, plus extra for dusting the tin
200g good cocoa powder
2 1/4 tsp bicarbonate of soda
1/2 tsp salt
200g granulated sugar
200g light brown sugar
3 extra-large eggs, at room temperature
3 tsp pure vanilla essence
125ml buttermilk, at room temperature
175ml sour cream, at room temperature
3 tbsp freshly brewed coffee

For the frosting

700g milk chocolate chips
375ml double cream
2 tbsp golden syrup
1/2 tsp pure vanilla essence
4 tbsp (50g) unsalted butter, at room temperature
Smarties or M&Ms for decorating
1) Preheat the oven to 180C/Gas mark 4. Butter and flour a 30.5 x 46 x 4-cm cake tin and set aside. In a medium bowl, sift together the flour, cocoa, bicarbonate of soda and salt.

2) In the bowl of an electric mixer fitted with a paddle attachment, cream the butter and both sugars on high speed until light, approximately 5 minutes. Add the eggs, one at a time, and the vanilla and mix well. Combine the buttermilk, sour cream, and coffee.

3) On low speed, add the flour mixture and the buttermilk mixture alternately in thirds, beginning with the buttermilk mixture and ending with the flour mixture. Mix the batter only until blended.

4) Pour the batter into the prepared tin and smooth the top with a spatula. Bake in the centre of the oven for 25 to 30 minutes, or until a cocktail stick comes out clean. Cool to room temperature before icing.

5) Place the chocolate chips and double cream in a bowl set over a pot of simmering water, stirring occasionally, until the chips are completely melted. Off the heat, add the golden syrup and vanilla and allow the chocolate mixture to cool to room temperature.

6) In the bowl of an electric mixer fitted with the whisk attachment, whisk the chocolate mixture and softened butter on medium speed for a few minutes, until it's thickened. Spread the frosting evenly on the cake. allow the children to decorate the cake with sweets.

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