If using a cake mix with pudding in the mix, reduce water to 1 cup.
Prepare batter as directed; pour into 13x9-inch pan sprayed with cooking spray. Bake at 350°F for 40 to 45 min. or until toothpick inserted in center comes out clean. Do not remove cake from pan. Sprinkle cake with powdered sugar just before serving.
High Altitude Directions
Prepare as directed, adding 1/4 cup flour and increasing water to 1-1/2 cups.