3 T butter or margarine, 1 package of marshmallows, 6 c Rice Krispies.
Melt the butter on low heat, melt in marshmallows. Remove from heat and stir in 6 C Rice Krispies. With a buttered spatula, spread out on a cookie sheet to cool. Use within the day.
You can even use 5 c Rice Krispies and 1 c Cinnamon Toast Crunch.