In a large mixing bowl, combine ground beef, beaten egg, salt, black pepper, garlic powder, and optional cheddar cheese. Gently mix until just combined.

Divide the mixture into four equal portions, shaping each into a roughly 4-ounce burger patty.

Preheat a skillet or grill over medium-high heat for about 5 minutes, adding olive oil if using a skillet.

Carefully place the patties onto the heated surface and cook for 4-5 minutes on one side until browned. Flip and cook for another 4-5 minutes.

Remove patties from heat and let them rest for a few minutes before serving with your choice of toppings.