INGREDIENTS
1 cup
unsalted butter , melted and cooled at least 10 minutes (226g)
1 1/4 cups
brown sugar tightly packed (250g)
1/2 cup
sugar (100g)
1
large egg + 1 yolks (room temperature preferred)*
1 1/2 tsp
vanilla extract
2 3/4 cups
all-purpose flour (350g)
2 tsp
cornstarch
1 tsp
baking soda
3/4 tsp
salt
1 3/4 cups
semisweet chocolate chips (plus additional for tops, optional) (300g + additional)