Preheat the oven to 400°F. Pour soy sauce and melted butter over the tenderloin.  Bake in preheated oven for 10 minutes, then turn the roast over, and continue cooking 35 to 40 minutes, basting occasionally until the internal temperature of the roast is at 140 degrees F (60 degrees C) for medium.  Or, cook to your desired degree of donenes
1 Reduce heat to medium and stir in 1 tablespoon butter, shallots, and a pinch of salt; cook until shallots are soft and translucent, 5 to 7 minutes. 2  Pour tarragon vinegar into the skillet and bring to a boil while scraping any browned bits off of the bottom. 3  Stir until liquid is reduced by half, 2 to 4 minutes. Roast the tenderloin until an instant-read meat thermometer indicates an internal temperature of 135 degrees for medium rare or 145 degrees for medium. A two to three pound tenderloin will take 30 to 40 minutes to reach medium rare and 45 to 50 minutes to reach medium. Step 2: Roast or grill the tenderloin. Roast: Browning the tenderloin first is optional, but it does caramelize the outside and lock in the juices. In a large skillet heat olive oil over medium-high heat. Quickly brown the tenderloin on all sides in the hot oil. 1 Pour soy sauce and melted butter over the tenderloin. 2  Bake in preheated oven for 10 minutes, then turn the roast over, and continue cooking 35 to 40 minutes, basting occasionally until the internal temperature of the roast is at 140 degrees F (60 degrees C) for medium. 3  Or, cook to your desired degree of doneness. Method: Preheat the oven to 400°F. Put 1 tablespoon of the oil, 1/2 tablespoon of the rosemary, thyme, garlic, 1 1/2 teaspoons of the salt and 1/2 teaspoon of the pepper into a small bowl and mix well. Rub mixture all over beef; set aside. 1 Heat vegetable oil in a large ovenproof skillet over high heat. 2  Place beef in the skillet; cook until brown on all sides, 5 to 8 minutes per side. 3  Reduce heat to medium and stir in 1 tablespoon butter, shallots, and a pinch of salt; cook until shallots are soft and translucent, 5 to 7 minutes. The best way to cook beef tenderloin is a two-step process: sear, then roast. That way, the tenderloin gets a nice crusty brown exterior without overcooking inside. Use enough vegetable oil to just cover the skillet, and heat it over medium-high heat. Pat the tenderloins dry, and then season with salt. 1 Bake in preheated oven for 10 minutes, then turn the roast over, and continue cooking 35 to 40 minutes, basting occasionally until the internal temperature of the roast is at 140 degrees F (60 degrees C) for medium. 2  Or, cook to your desired degree of doneness. 3  Let meat rest for 10 to 15 minutes before slicing.
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how to bake a beef tenderloin