1/4 c. regular butter
1 (10 oz.) pkg. marshmallows (about 40) or 4 c. of miniature marshmallows
6 c. Rice Krispies (or other small crunchy types of cereal may be substituted)

Melt butter in saucepan over low heat. Add marshmallows and stir until completely melted, stirring constantly. Remove from heat. Add Rice Krispies. Stir until well coated. Using buttered spatula or waxed paper, press mixture evenly into a 13 x 9 x 2 inch pan. Cut into 2 inch squares when cool.