INGREDIENTS
1 cup
unsalted butter
1/2 cup
granulated sugar
1 cup
packed light or dark brown sugar
1
large egg + 1 egg yolk, at room temperature
2 tsp
pure vanilla extract
2
and 1/2 cups (312g) all-purpose flour (spoon & leveled)
1 tsp
cornstarch
1 tsp
baking soda
1/2 tsp
salt
2 tbsp
(30ml) milk
1
and 1/2 cups (270g) semi-sweet chocolate chips