INGREDIENTS
1/2 cup
unsalted butter, browned
1
large egg
3/4
cup light brown sugar, packed
1/4 cup
granulated sugar
2 tsp
vanilla extract
1 2/3 cups
all-purpose flour
2 tsp
cornstarch
1 tsp
baking soda
1/2 tsp
salt, or to taste
1/2 cup
semi-sweet chocolate chips
1/2 cup
peanut butter chips