For the sponge

For the chocolate buttercream

For the decoration


  • STEP 1

    Heat the oven to 190C/170C fan/gas 5. Oil two 20cm sandwich tins and line the bases with non-stick baking paper. Sieve the flour, cocoa and baking powder into a large bowl, then stir in the sugar. Whisk together the oil, yogurt, milk, coffee and eggs in a jug until combined. Gradually whisk the wet ingredients into the flour mixture until you have a smooth batter. Fold in the chocolate chips.

  • STEP 2

    Divide the mixture between the tins and bake for 30-35 mins, until a skewer inserted into the centre of each sponge comes out clean. Remove from the tins and put on a wire rack to cool completely.

  • STEP 3

    Meanwhile, make the buttercream. Beat together the butter, icing sugar and cocoa for 5-8 mins until smooth and creamy. Melt the dark chocolate in a bowl over a pan of boiling water, or in 30 second blasts in the microwave. Whisk the melted chocolate into the buttercream until fully incorporated. Put three quarters of it into a piping bag with a large, round nozzle.

  • STEP 4

    Put one of the sponges onto a plate and pipe buttercream around its edge, with dots going around the circumference. Spread 2 tbsp of the remaining buttercream in the centre of the cake using a spoon or palette knife.

  • STEP 5

    Mix together the caramel and milk with a pinch of salt. Spread half the caramel into the centre to cover the layer of buttercream. Crumble half of the cookies on top of that. Chill for 30 mins until the buttercream has hardened slightly.

  • STEP 6

    Lay the second sponge on top of the first. Repeat the piping of the dots around the top of the cake, but this time fill the whole circle with dots of buttercream. Drizzle the salted caramel over the buttercream dots. Break the remaining cookies into halves or quarters and arrange on top of the cake, then grate over a little dark chocolate, if you like.


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