INGREDIENTS
3/4 cup
unsalted butter, room temperature
3/4 cup
light brown sugar, packed
1/4 cup
sugar
1
egg
1
egg yolk
2 tsp
vanilla extract
1 3/4 cups
all purpose flour
1 tsp
baking soda
1/2 tsp
baking powder
1 1/2 tsp
cornstarch
3/4 tsp
salt
1 3/4 cups
uncooked quick cook oats
1 3/4 cups
semi sweet chocolate chips