INGREDIENTS
1
Egg plus 1 egg yolk, large
1 3/4 cups
All-purpose flour
1 tsp
Baking soda
1/2 cup
Brown sugar, dark
1 tsp
Cornstarch
1/2 cup
Granulated sugar
1/2 tsp
Salt
1 1/4 cups
Semi-sweet chocolate chips
1 tsp
Vanilla extract
3/4 cup
Butter, unsalted