INGREDIENTS
1
Egg yolk, large
2
Eggs, large
1 3/4 cups
All-purpose flour
1 tsp
Baking powder
2 tsp
Baking soda
3/4 cup
Cocoa powder
1 1/4 cups
Confectioners' sugar
1 tsp
Salt
6 oz
Semisweet or bittersweet chocolate
2 cups
Sugar
2 tsp
Vanilla
1/2 cup
Vegetable oil
1 cup
Coffee, hot
1 tbsp
Instant coffee
2 tbsp
Butter
2 sticks
Butter, unsalted