INGREDIENTS
1 cup
unsalted butter, softened
1 cup
brown sugar, packed
3/4 cup
granulated sugar
2 tsp
vanilla extract
1
egg
1
egg yolk
2 3/4 cups
all-purpose flour
1 tsp
cornstarch
1 1/4 tsp
baking soda
1 1/4 tsp
salt
2/3 cup
Andes mints, chopped (about 21 mints)
1/2 cup
mint chips
1/4 cup
semisweet or bittersweet chocolate chunks (about 2 ounces)