INGREDIENTS
1
Egg, large
1
Egg yolk
2 1/2 cups
All purpose flour
1 tsp
Baking powder
1 tsp
Baking soda
1 1/4 cups
Brown sugar, packed
2 1/2 cups
Chocolate chips, semisweet
1 tbsp
Cornstarch
1/2 cup
Milk chocolate chips plus
1/2 tsp
Salt
1 tsp
Vanilla
3/4 cup
White sugar
1 1/2 sticks
Butter