Rice Krispie Squares

4 T Butter
4 c Marshmallows or 10 oz
5 c Rice krispie cereal
Melt butter in saucepan over low heat.
Add marshmallows and stir till melted. Cook 3 minutes, stirring constantly . Remove from heat, add Rice Krispies and stir until all are coated. Using buttered spatula, press evenly into buttered 13x9x2" pan. Cool. Cut into 2" squares.