¼ cup margarine
1 10-ounce package marshmallows (or 4 cups mini marshmallows)
5 cups Rice Krispie cereal
Melt margarine in large saucepan over low heat. Add marshmallows and stir until melted and well blended. Cook over low heat 3 minutes longer, stirring constantly. Remove from heat. Add Rice Krispie cereal. Stir until well coated. Using buttered spatula or waxed paper, press mixture evenly and firmly in buttered 9x13 pan. Cut into squares when cool.