Classic Rice Krispie Treats

3 tablespoons butter
1 package marshmallows
6 cups Rice Krispies®

Directions: Melt butter in large saucepan over low heat. Add marshmallows and stir until completely melted. Remove from heat. Add KELLOGG'S RICE KRISPIES cereal. Stir until well coated.Using buttered spatula or waxed paper, press mixture evenly into 13 x 9 x 2-inch pan coated with cooking spray. Cut into 2-inch squares when cool.