Preheat oven to 190 °C and place the paper cups in the muffin tray.
In a bowl, mix flour, cheese, sugar, baking powder, salt and pepper.
In a second bowl, mix egg, milk and oil. Add the wet mixture to the flour mixture. Spread batter evenly in paper pans and bake in oven and about 15 minutes.
Remove moldy Halloween muffins from oven and sprinkle with green and orange cheese sprinkles. Let bake for 5 more minutes until cheese is nicely melted.