INGREDIENTS
1
Egg yolk
2
Eggs, large
3/4 cup
All-purpose flour
1/2 tsp
Baking powder
1/2 cup
Brown sugar, light packed
3 oz
Chocolate, semisweet fine
1/2 cup
Cocoa powder, unsweetened
1
Cookie butter frosting
1/2 cup
Granulated sugar
1/2 tsp
Salt
1 1/2 tsp
Vanilla extract
1/2 cup
Butter, unsalted