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Full of M&M's- what a treat! Requires margarine, 1 egg, and vanilla. Makes 9x9 pan.
Preheat oven to 375 degrees. Cream 6 Tbsp. margarine, 1 egg, and ½ tsp vanilla. Add the mix and stir until mixture is blended. Spread batter into lightly greased 9x9 pan. Bake for 25 minutes or until done.