INGREDIENTS
2 cups
+ 2 tablespoons all-purpose flour
1/2 tsp
baking soda
1/2 tsp
salt
3/4 cup
unsalted butter, softened to room temperature
1 cup
packed light brown sugar
1/2 cup
granulated sugar
1
large egg, at room temperature
1
large egg yolk, at room temperature
2 tsp
pure vanilla extract
1
cup mini M&Ms