1. Combine ground beef, Irish stout beer, Worcestershire sauce, garlic powder, onion powder, salt, and pepper in a mixing bowl. Mix gently until just combined. Divide mixture into four equal portions and shape each into a patty about 3/4-inch thick with a slight indentation in the center.

2. Preheat grill or skillet over medium-high heat. Cook patties for 4–5 minutes on each side, flipping only once. In the final minute of cooking, place a slice of Irish cheddar cheese on top of each patty and cover to melt.

3. Butter hamburger buns and toast on the grill or in a skillet until golden brown and crispy.

4. Assemble the burger by placing each cooked patty on the bottom half of a toasted bun, adding optional toppings like lettuce, tomato, pickles, mustard, and mayonnaise. Top with the other half of the bun.