INGREDIENTS
1
Egg, large
1
Egg yolk, large
2 1/4 cups
All-purpose flour
1 tsp
Baking soda
1 cup
Brown sugar, light
1/2 cup
Granulated sugar
1 tsp
Kosher salt
2 cups
Semisweet or bittersweet chocolate
1 1/2 tsp
Vanilla extract, pure
2 sticks
Butter, unsalted
2 tbsp
Milk