Rice Krispies Treats

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1/4 cup butter
10 ounce package marshmallows
6 cups rice krispies

In a large saucepan, melt butter over low heat. Add the marshmallows and continue to stir until the marshmallows have completely melted. Remove from heat.
Stir in the rice krispies cereal coating them well with the melted marshmallow mixture.
Using a buttered spoon, or a buttered hand, press the mixture evenly into a 13 x 9 inch pan which has been buttered or lined with wax paper.
Cut into squares when cool.