Peel and chop the potatoes into 2-inch chunks, then boil in salted water until fork-tender.

Drain the cooked potatoes and return them to the pot. Add cream, melted butter, salt, and pepper, then mash until smooth.

Shape the mashed potatoes into skulls using a mold or your hands, ensuring they hold their form.

Decorate with black olives for eyes and optionally cut olives for a mouth.

Transfer to a platter, garnish with chives or green onions, and serve warm.