INGREDIENTS
1/2 cup
butter (at room temperature)
1 cup
granulated sugar
3
large eggs (divided (1 egg, 2 yolks, and 2 egg whites))
1 tsp
vanilla extract
1 1/2 cups
all-purpose flour
1 tsp
baking powder
1/4 tsp
salt
1/2 cup
semi-sweet chocolate chips
1 cup
mini marshmallows
1 cup
light brown sugar