Melt margarine in large saucepan over low heat Add marshmallows and stir until completely melted. Remove from heat. Add Rice Krispies cereal. Stir until well coated. Using buttered spatula or waxed paper, press mixture evenly into 13x9x2” pan coated with cooking spray. Cut into 2” squares when cool.
Microwave margarine and marshmallows at HIGH 2 min. in microwave-safe bowl. Stir to combine. Microwave at HIGH 1 minute longer. Stir until smooth. Add Ceral and stir until well coated. Press into pan as directed above.
-from Kellog’s web site