Wipe out skillet. Add remaining tablespoon of butter and olive oil. Season steaks on both sides with salt and pepper. Add steaks to skillet. Cook over medium high heat, about 5-6 minutes on each side for rare. Remove steaks to servingdishes. Keep warm.
Put mushroom sauce into the same skillet the steaks were cooked in; heat through. Add a few drops more wine if needed to thin slightly. Pour over steaks. Servings 2.