Substitute
Prepare using your favourite flavour of Jell-O Instant Pudding.
Shortcut
Instead of dropping spoonfuls of Cool Whip, use a resealable plastic bag to make the ghosts. Fill bag with remaining Cool Whip; seal bag. Use scissors to diagonally cut off corner from bottom of bag. Squeeze Cool Whip from bag to resemble the ghosts.
Make Ahead
Desserts can be stored in refrigerator until ready to serve.