Ingredients
3 ounces unsweetened chocolate, coarsely chopped
1/4 cup hot water
1 tsp instant coffee granules
2 tbsp dutch-processed cocoa
3/4 cup granulated sugar
6 tbsp unsalted butter, softened
2 large eggs
2 large egg yolks
1 tsp vanilla extract
3/4 cup all-purpose flour
3/4 tsp baking soda
1/2 tsp salt
1/2 cup buttermilk
Preparation