Spray multi-cavity pumpkin and ghost pan with vegetable pan spray.
In large saucepan, melt butter; add marshmallows. Cook and stir until melted.
Divide mixture in half; stir orange icing color into 1 portion. Add half of cereal to orange mixture; mix well. Repeat with remaining cereal and white marshmallow mixture.
Press into prepared pan; carefully remove from pan and allow to cool. Insert cookie stick; add confetti eyes and mouth.