1 (10 oz.) pkg. marshmallows
1/4 c. butter
1/3 c. peanut butter
8 c. frosted corn flakes

In 4 quart microwave bowl, melt butter and marshmallows on high for three minutes, stirring halfway through cooking. Stir in peanut butter until smooth. Add frosted flakes stirring until well-coated. Using a buttered spatula, spread mixture in lightly greased 13 x 9 x 2 inch pan. When cool, cut in 2 inch bars.