Step One : Preheat oven to 350°
Step two : Grease the baking pan
Step Three : Combine dry ingredients in large bowl (sugar, baking cocoa, flour, baking powder, salt) and then stir.
Step Four : Add wet ingredients (eggs, water, melted butter, and vanilla) and then the m&m's and stir well.
Step Five : Spread into a baking pan.
Step Six : Bake for 18 to 25 minutes or until a toothpick can be inserted in center and comes out slightly sticky.