INGREDIENTS
1 cup
butter, softened
1 cup
brown sugar
1/2 cup
granulated sugar
1
large egg
1
large egg yolk
1 tbsp
vanilla extract
2 cups
flour
1 cup
old-fashioned oats (you can use quick cooking oats)
1 tsp
baking powder
1 tsp
baking soda
1 tsp
salt
1 1/3 cups
chocolate chips
1 cup
M&M's
1/3 cup
M&M's