preheat the oven to 375. in large bowl, cream the buter, eggs and vanilla. add the M&ms, flour, baking soda, baking powder, and sugar and stir until the mixture is well blended. spread batter into a lightly greased or sprayed 9 x 12 inch pan. bake for 25 to 30 minutes. cool in pan cut into 2-inch squares. and eat