Melt 3 tablespoons butter and 1/2 pound marshmallows over hot water. Add 1/3 cup peanut butter. Blend well. Add 4 cups Special K or Wheaties or Rice Krispies. Pour in buttered 9x9 or 8x8 inch pan and cover with melted chocolate chips. Wet hands to pat it down in the pan. Let stand several hours. Could use butterscotch chips.