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