In large saucepan melt butter over low heat. Add marshmallows and stir until completely melted. Remove from heat.
Add KELLOGG'S® COCOA KRISPIES® cereal. Stir until well coated.
Using 1/2-cup measuring cup coated with cooking spray divide warm cereal mixture into portions. Using buttered hands shape each portion into a ball. Decorate with candy to make cat eyes, nose, mouth, ears and whiskers. Best if served the same day.
In microwave-safe bowl heat butter and marshmallows on HIGH for 3 minutes, stirring after 2 minutes. Stir until smooth. Follow steps 2 and 3 above. Microwave cooking times may vary.