I tried this marinade over the summer and it was great! I used Leffe for the dark beer.
• 2 (16 ounce) beef sirloin steaks
• 1/4 cup dark beer
• 2 tablespoons teriyaki sauce
• 2 tablespoons brown sugar
• 1/2 teaspoon seasoned salt
• 1/2 teaspoon black pepper
• 1/2 teaspoon garlic powder
DIRECTIONS
1. Preheat grill for high heat.
2. Use a fork to poke holes all over the surface of the steaks, and place steaks in a large baking dish. In a bowl, mix together beer, teriyaki sauce, and brown sugar. Pour sauce over steaks, and let sit about 5 minutes. Sprinkle with 1/2 the seasoned salt, pepper, and garlic powder; set aside for 10 minutes. Turn steaks over, sprinkle with remaining seasoned salt, pepper, and garlic powder, and continue marinating for 10 more minutes