Ingredients
Cocoa cream filling
White chocolate ganache
Method
Chocolate and rhubarb layer cake
1.Preheat oven to 170°C. Line a 28cm springform tin with baking paper.
2.Sift together dry ingredients in a large bowl.
3.Beat eggs and sugar until pale and creamy, then pour in coffee, oil and vanilla. Mix until combined.
4.Fold wet ingredients into dry and stir until combined.
5.Pour into prepared tin.
6.Bake for 35-45 minutes or until a skewer inserted comes out clean.
7.Cool for 10 minutes in the tin before turning out onto a wire rack to cool. When completely cool, slice into 3 equal layers.
Cocoa cream filling
8.Whip cream to soft peaks, then add icing sugar and sifted cocoa. Continue beating to stiff.
White chocolate ganache
9.Heat cream to trembling stage, then add white chocolate buttons. Cover with a tea towel and leave for 10 minutes before whisking together to a smooth ganache.
To assemble
10.Use a fork to pulp one cup of the roasted rhubarb and spread half on the bottom layer of the cake. Spoon half the chocolate cream on top, add the second cake layer, and repeat.
11.Place the top layer, drizzle with ganache, leave for 10 minutes to set slightly, then top with the remaining rhubarb.