Perfectly Roasted Beef Tenderloin at 400°F: A Simple Guide

How Long Should You Cook Beef Tenderloin in the Oven at 400°F?

Cooking beef tenderloin in the oven at 400°F is a surefire way to get a delicious, juicy centerpiece for any special meal. But how long should you cook it to achieve that perfect pink center? Let’s break down the process step by step to ensure your beef tenderloin turns out just right, whether you like it rare, medium-rare, or well done.

Understanding Beef Tenderloin

Beef tenderloin is one of the most tender and prized cuts of beef. It’s lean, mild in flavor, and cooks quickly compared to other cuts. Because of its tenderness, it’s important not to overcook it. This cut is often served as a whole roast, making it perfect for holidays or dinner parties.

How Long to Cook Beef Tenderloin at 400°F

The cooking time for beef tenderloin at 400°F depends on the weight of your roast and your preferred doneness. Here’s a quick guide:

• Rare (120-125°F): About 20-25 minutes per pound
• Medium-Rare (130-135°F): About 25-30 minutes per pound
• Medium (140-145°F): About 30-35 minutes per pound
• Medium-Well (150-155°F): About 35-40 minutes per pound
• Well Done (160°F+): About 40-45 minutes per pound

For example, a 3-pound beef tenderloin cooked to medium-rare will take roughly 75-90 minutes at 400°F. Remember, these are guidelines—always use a meat thermometer for best results.

Step-by-Step: Roasting Beef Tenderloin at 400°F

1. Preheat Your Oven: Set it to 400°F and let it come to temperature.
2. Prepare the Tenderloin: Trim any excess fat or silver skin. Tie the roast with kitchen twine every couple of inches for even cooking.
3. Season Generously: Rub the beef with olive oil, salt, pepper, and your favorite herbs (like rosemary, thyme, or garlic powder).
4. Sear (Optional but Recommended): Heat a skillet over high heat with a bit of oil. Sear the tenderloin on all sides until browned—about 2-3 minutes per side. This adds flavor and helps lock in juices.
5. Roast: Place the tenderloin on a rack in a roasting pan or on a baking sheet lined with foil. Insert a meat thermometer into the thickest part of the meat.
6. Bake: Transfer to the oven and roast according to your desired doneness (see timing above).
7. Rest: Remove from the oven when the thermometer reads about 5°F below your target temperature (it will continue to cook as it rests). Tent loosely with foil and let rest for at least 15 minutes before slicing.

Tips for Perfect Beef Tenderloin

• Let It Come to Room Temperature: Take the beef out of the fridge about an hour before cooking. This ensures even roasting.
• Use a Meat Thermometer: This is the most reliable way to hit your preferred doneness without guesswork.
• Sear for Extra Flavor: While not essential, searing adds a beautiful crust and enhances taste.
• Tie the Roast: Tying ensures even thickness so it cooks uniformly.
• Resting Is Key: Allowing the meat to rest lets juices redistribute, resulting in a moist, tender roast.
• Slice Against the Grain: This helps keep each slice tender.

Serving Suggestions

Beef tenderloin pairs wonderfully with classic sides like roasted potatoes, steamed asparagus, sautéed green beans, or a fresh salad. For an extra touch, serve with horseradish cream sauce or a rich red wine reduction.

Storing and Reheating Leftovers

• Storage: Wrap leftovers tightly in foil or place in an airtight container. Store in the refrigerator for up to 4 days.
• Reheating: Gently reheat slices in a low oven (around 250°F) covered with foil until just warmed through to avoid drying out.
• Freezing: You can freeze cooked beef tenderloin for up to three months. Wrap tightly in plastic wrap and then foil before freezing.

Frequently Asked Questions

Should I cover my beef tenderloin while roasting?

No need! Roasting uncovered at 400°F allows the exterior to develop a delicious crust.

How do I know when my beef tenderloin is done?

The most accurate way is with a meat thermometer. Insert it into the thickest part of the roast and check against your desired doneness temperature.

Can I marinate beef tenderloin?

You can, but since it’s already very tender, a simple rub of oil and seasonings is usually enough. If you do marinate, keep it under four hours to avoid mushy texture.

Is searing necessary?

Searing isn’t required but highly recommended for extra flavor and a beautiful crust.

What if my roast is larger or smaller than average?

Adjust cooking time accordingly—use the “minutes per pound” guideline and always check with a thermometer.

Your Go-To Guide for Perfect Beef Tenderloin

Roasting beef tenderloin at 400°F is a straightforward way to impress your guests or treat yourself to something special. With these tips—timing based on weight and doneness, using a thermometer, searing for flavor, and letting it rest—you’ll master this classic dish every time. Happy cooking!