Basic Rice Krispies Treats

3T butter
1 package (10 oz) marshmallows
6 cups Rice Krispies

In a large saucepan melt butter over low heat.  Add marshmallows and stir until completely melted.  Remove from heat and stir in Rice Krispies until well coated.  Pour into a 9x13 pan and press down with wax paper until flat.   Cool.  Cut into squares.