INGREDIENTS
1 1/3 cups
all-purpose flour
1/2 tsp
baking soda
1/2 tsp
salt
1/2 cup
salted butter, softened
1/4 cup
plus 2 tablespoons granulated sugar
1/4 cup
plus 2 tablespoons packed brown sugar
1/2 tsp
vanilla extract
1
large egg
1 cup
high-quality chocolate, like Guittard
Flake salt, for garnish