Mushroom & Gravy Cube Steak Recipe, Directions: Make the sauce first: In a medium skillet, over low heat, cook onion in 2 tsp of butter. Add mushrooms, saute 5-6 minutes over medium heat. Add beef broth over high heat and let it simmer for a bit to thicken up. I ended up using 1 1/2 cans of the beef broth because we like lots of gravy. Now for the steaks: Combine flour and pepper and coat steaks in a large skillet. Melt 1tsp of butter and cook steaks 3-4 minutes until browned. Pour mushroom sa