Peel and chop mini creamer potatoes into 1-inch chunks. Boil in salted water until fork-tender (15–20 minutes). Drain well and steam dry in the hot pot.
Mash the potatoes in a mixing bowl until smooth. Stir in lemon juice, olive oil, salt, pepper, onion powder, garlic powder, and smoked paprika until combined.
Shape about ½ cup of potato mixture per skull into an oval shape on parchment-lined baking sheets. Pinch top for cranium dome and carve eye sockets and mouth features.
Preheat oven to 400°F (200°C) and brush each skull with olive oil. Bake for 20–30 minutes until golden brown.
Garnish with smoked paprika and optional toppings before serving warm.