INGREDIENTS
3/4 cup
butter, softened (1½ sticks)
3/4 cup
brown sugar
1/2 cup
granulated sugar
1
large egg
2 tsp
vanilla extract
1 3/4 cups
all-purpose flour
3/8 cup
dark cocoa powder
1 tbsp
cornstarch
1 tsp
baking soda
1 tsp
salt
1 1/2 cups
semi-sweet or dark chocolate chips
Flaky sea salt