1. Combine shredded cheese, pepper sauce, ground beef, chopped onion, and salt and pepper.
2. Mix well, let stand for about 10 minutes and then shape into 8 burgers.
3. Grill for about 5 to 6 minutes per side or to desired doneness.
4. Brush inside of buns with butter and place cut side down on grill to brown very lightly.
5. Serve burgers on warm buns with your favorite toppings.