Cooking a tenderloin of beef requires precision. This cut is lean and tender. It comes from the loin area of the cow. Overcooking it leads to dryness. Perfect timing ensures juicy results. Many home cooks wonder how long to cook it. The answer depends on method and desired doneness.
Tenderloin shines in roasts or steaks. A whole tenderloin weighs 4 to 6 pounds. It serves 8 to 12 people. Trim silver skin before cooking. Season simply with salt, pepper, and herbs. Use a meat thermometer for accuracy. Internal temperatures guide doneness: rare at 125°F, medium-rare at 135°F, medium at 145°F.
Understanding Beef Tenderloin
Beef tenderloin is prized for tenderness. Little connective tissue makes it soft. It lacks bold flavor from marbling. High heat sears the outside. Resting redistributes juices.
Select a high-quality cut. Look for bright red color. Avoid excessive fat. USDA Prime or Choice grades work best. Let it reach room temperature before cooking. This promotes even cooking.
Portion it into steaks like filet mignon. Or roast whole for holidays. Both methods demand attention to time.
Preparation Steps
Start with trimming. Remove the silver skin with a sharp knife. Pat dry with paper towels. This helps browning.
Season generously. Kosher salt draws out moisture for better sear. Pepper adds bite. Garlic, rosemary, or thyme enhance flavor. Rub oil over the surface.
Tie the roast if uneven. Butcher twine keeps shape. For steaks, cut 1.5 to 2 inches thick.
Preheat your cooking surface. Oven, grill, or pan all work. High heat first for crust.
Oven Roasting Method
Oven roasting suits a whole tenderloin. Preheat to 450°F for searing. Then lower to 400°F.
Sear first. Place on a rack in a roasting pan. Roast at 450°F for 15 minutes. Reduce to 400°F. Continue until thermometer reads 5-10°F below target.
How long do you cook a tenderloin of beef in the oven? For a 5-pound roast:
- Rare: 45-50 minutes total.
- Medium-rare: 50-55 minutes.
- Medium: 55-60 minutes.
Rest under foil for 15-20 minutes. Temperature rises 5-10°F. Slice against the grain.
Use a probe thermometer. Insert into thickest part. Avoid bone or fat.
Pan-Searing Steaks
Pan-sear filet mignon steaks. Heat cast-iron skillet over high heat. Add oil with high smoke point.
Sear 3-4 minutes per side for 1.5-inch steaks. Baste with butter, garlic, herbs.
Finish in oven at 400°F if needed. Times vary by thickness.
How long do you cook a tenderloin of beef steak?
- Rare (1.5 inches): 2-3 minutes per side.
- Medium-rare: 3-4 minutes per side.
- Medium: 4-5 minutes per side.
Check with thermometer. Remove at 130°F for medium-rare. Rest 5 minutes.
Grilling Tenderloin
Grill for smoky flavor. Preheat to high, 450-500°F. Two-zone setup: hot direct and cooler indirect.
Sear over direct heat. 3-5 minutes per side for whole roast or steaks.
Move to indirect. Close lid. Cook until target temperature.
How long do you cook a tenderloin of beef on the grill? Similar to oven: 45-60 minutes for whole, less for steaks. Flip once. Baste with marinade.
Wood chips add aroma. Avoid flare-ups with trimmed fat.
Sous Vide Precision
Sous vide guarantees perfection. Vacuum-seal seasoned tenderloin. Set water bath to target doneness.
Times:
- Steaks (1.5 inches): 1-2 hours at 130°F for medium-rare.
- Whole roast: 2-4 hours at 130°F.
Pat dry. Sear 1 minute per side for crust.
This method forgives timing errors. No overcooking risk.
Reverse Sear Technique
Reverse sear starts low and slow. Oven at 225°F until 10-15°F below target. About 45 minutes for 5-pound roast.
Rest briefly. Sear in hot skillet or grill, 1-2 minutes per side.
Ideal for even doneness. Crust forms perfectly.
Common Mistakes to Avoid
- Don’t skip the thermometer. Eyeballing fails. Times are estimates.
- Avoid high heat throughout. It dries the lean meat.
- Rest always. Cutting early releases juices.
- Over-seasoning hides tenderness. Keep it simple.
- Thawing frozen tenderloin slowly in fridge. Quick methods toughen it.
Serving Suggestions
- Slice thin for platters. Serve with horseradish sauce, red wine reduction, or béarnaise.
- Pair with roasted vegetables, mashed potatoes, or asparagus.
- Wine match: Cabernet Sauvignon or Pinot Noir.
- Portion 6-8 ounces per person.
Tips for Perfect Results
- Bring to room temp: 1 hour out of fridge.
- Dry brine: Salt 24 hours ahead.
- High-quality pan for searing.
- Calibrate oven thermometer.
- Track carryover cooking.
FAQs
How long do you cook a tenderloin of beef per pound?
Cook 10-12 minutes per pound at 400°F after initial sear for medium-rare. Adjust for doneness. Always use a thermometer.
What’s the best internal temperature for tenderloin?
135°F for medium-rare. Pull from heat at 125-130°F. Rest brings it up.
Can you cook tenderloin from frozen?
Yes, but add 50% time. Sous vide works best. Thaw first for optimal texture.
How do you know when tenderloin is done without a thermometer?
Press test: Firm for medium, soft for rare. Unreliable for beginners. Use thermometer.
Should you marinate beef tenderloin?
Optional. Acid marinates toughen lean meat. Salt and dry rub suffice. Marinate 30 minutes max.