Chocolate and peanut butter layer cake

30ml strong coffee

200g chocolate

200g butter, softened 

90ml water

390g brown sugar

85g plain flour

85g self-raising flour

25g cocoa powder

85g buttermilk

3 eggs

½ tsp baking powder

For the peanut buttercream:

250g butter, softened 

500g icing sugar

300g smooth peanut butter

80ml cream

For the ganache:

100ml cream

100g dark chocolate, broken into small pieces.