6 to 10 ounces marshmallows (about 40) or 4 cups miniature marshmallows
1/4 cup butter or margarine
5 cups Rice Krispies cereal
Melt butter in 3 quart saucepan.
Add marshmallows and cook over low heat, stirring constantly, until marshmallows are melted and mixture is syrupy.
Remove from heat.
Add rice krispies and stir until well coated.
Press warm mixture evenly and firmly into buttered 13x9-inch pan.
Cut into squares when cool.