1/4 c. butter
1 pkg. (10 oz.) reg. marshmallows (or 4 c. miniature marshmallows)
6 c. Rice Krispies

Melt butter in large pan over low heat. Add marshmallows. Stir until completely melted. Remove from heat and add Rice Krispies. Stir until well coated. Press mixture evenly into buttered 13x9x2 inch pan. Cut into squares when cool.