In small bowl, mix coffee (dry), brown sugar, pepper, garlic powder and onion powder. Rub generously on steaks to evenly coat both sides. Any leftover rub can be placed in sealed container and frozen for another use.
Heat gas or charcoal grill. Place steaks on grill over medium-high heat. Cover grill; cook 8 to 12 minutes or until desired doneness, turning once. Cut steaks into slices. Season to taste with salt.