Coffee, with or without chili powder, gives a unique depth of flavor to grilled steak. Pre-heat grill following manufacturer's instructions. Grind coffee beans to medium-fine, add optional chili powder, and mix thoroughly. Press coffee bean mixture evenly onto both sides of steaks.
Grill steaks directly over high heat, turning once until cooked to desired doneness. Remove from grill, season with salt, and let rest 5 minutes. Serve warm.