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Roman Rozenblyum/Demand Media

The method for cooking a filet mignon roast, also known as a beef tenderloin, involves the same techniques used when cooking any whole cut of beef, such as the rib sub-primal used in prime rib. Although cooking times vary depending on the size of the tenderloin and the type of oven used, all beef roasts should cook to a recommended internal temperature of 145 degrees Fahrenheit.

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Roman Rozenblyum/Demand Media

Preheat the oven to 500 degrees Fahrenheit.

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Roman Rozenblyum/Demand Media

Tie the roast at two-inch intervals using butcher's twine. Tying the roast helps the meat cook uniformly and contributes to the aesthetics of the finished product.

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Roman Rozenblyum/Demand Media

Season the meat, if desired. You may want to rub it with garlic or pepper, or use a rub of your own choosing.

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Roman Rozenblyum/Demand Media

Sear all sides of the tenderloin on the stovetop, either in the roasting pan or in a skillet large enough to contain the cut of meat. Pat the meat dry before you sear it to get the best browning.

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Roman Rozenblyum/Demand Media

Place the meat in the roasting pan, then place the pan in the oven. Immediately reduce the oven's temperature to 225 degrees Fahrenheit.

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Roman Rozenblyum/Demand Media

Check the internal temperature of the tenderloin every 60 minutes by inserting a probe thermometer into the center of the roast.

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Roman Rozenblyum/Demand Media

Remove the filet mignon roast when it's cooked to a USDA-recommended internal temperature of 145 degrees Fahrenheit.

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Roman Rozenblyum/Demand Media

Allow the meat to rest in a warm place for 15 minutes. This allows the meat's juices to redistribute within the roast and results in a moist final product.

Tip

When cooking a small tenderloin (less than three pounds), check the internal temperature every 30 minutes.

Warning

The USDA recommends cooking beef roasts to a minimum internal temperature of 145 degrees Fahrenheit.