INGREDIENTS
4 1/4 cups
all-purpose flour
1 tsp
baking soda
1 tsp
salt
1 1/2 cups
unsalted butter, melted & cooled until warm
2 cups
(lightly packed) light brown sugar
1 cup
granulated sugar
2
eggs plus 2 egg yolks
1 1/2 tbsp
pure vanilla extract
2 cups
semisweet chocolate chips
2 cups
M&Ms, DIVIDED