
Lets Begin...
- Butter a 20cm round cake tin (7.5cm deep) and line the base. Preheat the oven to fan 140C/conventional 160C/ gas 3. Break the chocolate in pieces into a medium, heavy-based pan.
- Tip in the butter, then mix the coffee granules into 125ml/4fl oz cold water and pour into the pan.
- Warm through over a low heat just until everything is melted - don't overheat. Or melt in the microwave on Medium for about 5 minutes, stirring half way through.
- While the chocolate is melting, mix the two flours, bicarbonate of soda, sugars and cocoa in a big bowl, mixing with your hands to get rid of any lumps. Beat the eggs in a bowl and stir in the buttermilk.
- Now pour the melted chocolate mixture and the egg mixture into the flour mixture, stirring just until everything is well blended and you have a smooth, quite runny consistency.
- Pour this into the tin and bake for 1 hour 25- 1 hour 30 minutes - if you push a skewer in the centre it should come out clean and the top should feel firm (don't worry if it cracks a bit).
- Leave to cool in the tin (don't worry if it dips slightly), then turn out onto a wire rack to cool completely.
- When the cake is cold, cut it horizontally into three. Make the ganache: chop the chocolate into small pieces and tip into a bowl. Pour the cream into a pan, add the sugar, and heat until it is about to boil.
- Take off the heat and pour it over the chocolate. Stir until the chocolate has melted and the mixture is smooth.
- Sandwich the layers together with just a little of the ganache. Pour the rest over the cake letting it fall down the sides and smoothing to cover with a palette knife.
- Decorate with grated chocolate or a pile of chocolate curls. The cake keeps moist and gooey for 3-4 days.