Monster Marshmallow Cookies... Monster Marshmallow Cookies Ingredients [b]For the Cookies:[/b] 2 cups all-purpose flour 1 teaspoon baking powder 1/2 teaspoon baking soda 2 sticks unsalted butter, softened 1 cup granulated sugar 1 cup packed light brown sugar 2 large eggs, at room temperature 1 tablespoon vanilla extract 2 cups quick-cooking oats 1 1/4 cups crispy