INGREDIENTS
2 1/4 cups
all-purpose flour
1 tsp
baking soda
1 1/2 tsp
cornstarch
1/2 tsp
salt
3/4 cup
unsalted butter, melted
3/4 cup
light brown sugar, packed
1/2 cup
granulated sugar
1
large egg + 1 egg yolk
2 tsp
vanilla extract
1
and 1/2 cups Mint Chocolate Baking Pieces