Reese’s Pieces Cookie Cake Bars

Ingredients: 1 box yellow cake mix 1 stick melted butter 1 1/2 teaspoon vanilla 2 eggs 2cups chocolate chips 1 small box of Reese's Pieces   Directions: Preheat oven to 350. Mix everything together. Place batter into a greased 9x13 pan. Bake for 20-25 minutes or until...