INGREDIENTS
For the Cake
140 g
dark chocolate
2 1/4 cups
all-purpose flour
1/2 cup
Dutch-process cocoa powder
1 tsp
baking powder
1/4 tsp
baking soda
3/4
buttermilk
3/4 cup
coffee, cooled slightly
1 tsp
vanilla extract
1/2 cup
unsalted butter, softened
1 1/2 cups
sugar
1/2 tsp
salt
4
large eggs
1/2 cup
Kahlúa
3/4 cup
hazelnuts, toasted and chopped roughly
For the Buttercream
200 g
dark chocolate
1/3 cup
Kahlúa
1/4 cup
heavy cream
1/2 cup
confectioners’ sugar
1 cup
butter, softened