- 1 cup ruby Port
- 1 cup dry white wine
- 2 8-ounce beef tenderloin steaks
- All purpose flour
- 3 tablespoons unsalted butter
- 1 tablespoon olive oil
- 2 tablespoons balsamic vinegar
- Boil Port and wine in heavy small saucepan until mixture is reduced to 2/3 cup, about 8 minutes. Set aside.
- Sprinkle steaks with salt and pepper. Dust with flour; shake off excess. Melt 1 tablespoon butter with oil in heavy large skillet over medium-high heat. Add steaks; cook to desired doneness, about 4 minutes per side for medium-rare. Transfer steaks to platter (do not clean skillet); tent steaks with foil to keep warm.
- Add Port mixture and vinegar to same skillet and bring to boil, scraping up any browned bits. Boil until reduced to sauce consistency, about 2 minutes. Remove from heat. Add remaining 2 tablespoons butter and whisk just until melted. Season sauce to taste with salt and pepper. Transfer steaks to plates. Spoon sauce over and serve.