INGREDIENTS
1 1/4 cups
or 156 grams) all purpose flour
1/3 cup
unsweetened natural cocoa powder
1 tsp
baking powder
1 tsp
instant espresso powder (optional)
1/4 tsp
salt
1 stick
unsalted butter, at room temperature
1/4 cup
granulated sugar
3/4 cup
packed light brown sugar
1
large egg
1
large egg yolk
1/2 tsp
vanilla extract
8 oz
semisweet chocolate, chopped