Steak Grill MarinateGrilled Coffee-Marinated Flank Steak Diana Rattray Updated on July 13, 2024January 16, 2024 Leave a Comment on Grilled Coffee-Marinated Flank Steak1 min read A bold coffee marinade adds flavor to this tender grilled flank steak. The steak is marinated for 2 to 4 hours.