INGREDIENTS
1
Egg, large
2 cups
All-purpose flour
1/2 tsp
Baking soda
1 cup
Brown sugar, packed light
7 oz
Chocolate, bittersweet or semisweet
1/2 cup
Cocoa powder
1/2 cup
Granulated sugar
1/2 tsp
Salt
1 tsp
Vanilla extract, pure
2 tbsp
Espresso, instant powder
3/4 cup
Butter, unsalted