1. Preheat oven to 375°F (190°C) and grease a skull pan with cooking spray or butter.

2. In a skillet over medium heat, cook ground beef until browned; drain excess fat.

3. Stir in onion, garlic powder, salt, pepper, and ketchup; cook 2–3 minutes, then remove from heat and mix in cheese.

4. Roll out pastry or flatten dough; cut into pieces slightly larger than each skull cavity.

5. Press dough into each cavity, fill with beef mixture, then fold and seal dough over filling.

6. Bake for 18–22 minutes until pastry is golden and cooked through.

7. Let cool 5 minutes, then carefully invert pan to release cheeseburger skulls.

8. Garnish with optional toppings or ketchup ‘blood’ before serving.