Editor's Note: This recipe was tested in a 1,100-watt microwave.

3 tablespoons butter
1 package (10-1/2 ounces) miniature marshmallows
1/2 cup peanut butter
5 cups Cheerios
1 cup milk chocolate M&M's

Place butter and marshmallows in a large microwave-safe bowl. Microwave, uncovered, on high for 1-2 minutes or until melted. Stir in peanut butter until blended. Add the cereal and M&M's. Spoon into a greased 13-in. x 9-in. pan; press down gently. Cool slightly before cutting