In a shallow bowl combine the beer, garlic, vinegar, olive oil, mustard, Worcestershire sauce, and Tabasco and mix well. Add the steak, sprinkle liberally with black pepper, and marinate 24 hours in the refrigerator, turning occasionally.
Preheat the grill to a high heat.
Remove meat from marinade and place on hot grill for 3 to 4 minutes on each side. Move to medium heat or to cooler edge of the grill and cook until done. Place the remaining marinade in a small cast iron sauce pot on your side burner and boil 2 minutes, Stir in the butter and heat until the butter melts. Slice the steak, arrange on a platter, and pour the marinade sauce over the meat.
Easy to make and delicious. There are so many beers to choose from, I recommend any pale ale or I.p.a. And the marinade goes great with vegetables, mushrooms even potatoes. The extra beer u get is also a nice bonus to go with this easy and excellent recipe.