1/2 c. butter
7 c. Rice Krispies
60 lg. or 6 c. miniature marshmallows
1/2 c. peanut butter, if desired

In large heavy saucepan, melt butter and marshmallows. When completely dissolved, stir in peanut butter and then Rice Krispies, mixing well. Using spatula, spread into buttered 13x9 inch pan.