M&M Cookies

Ingredients

2 cups flour
1 tablespoon cornstarch
3/4 teaspoon salt
1 teaspoon baking soda
3/4 cup brown sugar
1 1/2 sticks butter
1/2 cup sugar
1 egg
1 teaspoon vanilla
12 oz M&M's

Directions

Preheat oven to 350° F.