Perfectly Roasted: How Long to Cook Roast Beef at 275°F

Roast beef is a timeless classic that never goes out of style. When slowly roasted to tender juicy perfection it makes for the ultimate hearty meal. While roast beef is fairly straightforward, many home cooks wonder—how long should you cook it at 275°F for ideal doneness and flavor?

In this article, I’ll share timing guidelines, tips and tricks to help you determine the perfect cooking time for roast beef at 275°F. Whether you’re preparing a Sunday supper or holiday feast, you’ll learn how long different sizes and cuts of roast beef take. Let’s get roasting!

Why Cook Roast Beef at 275°F?

Cooking roast beef at a low 275°F oven temperature does a few key things

• Cooks the roast evenly from edge to center without burning the exterior.

• Allows time for collagen in the meat to break down into gelatin for tenderness.

• Develops richer flavor as the meat cooks in its own juices.

• Ensures a medium-rare to medium doneness that is juicy, not dry.

The relatively low and slow 275°F approach gives you the very best roasted beef texture and taste. Now let’s talk timing.

Cooking Time by Roast Weight

The weight of your roast is the primary factor determining cooking time. Here are some general guidelines:

• 3 pound roast: 3-4 hours
• 4 pound roast: About 4 hours
• 5 pound roast: 4-5 hours
• 6 pound roast: 5-6 hours
• 7+ pound roast: 6-8 hours

I recommend checking for doneness about 30 minutes before the low time estimates. If needed, continue roasting until it reaches your desired internal temperature.

Cooking Time by Cut

The cut of roast beef also impacts cooking time slightly. Here are estimates:

• Prime rib: 15-20 minutes per pound
• Ribeye: 15-20 minutes per pound
• Chuck roast: 18-24 minutes per pound
• Rump roast: 18-24 minutes per pound
• Eye of round: 25-30 minutes per pound

Again, use a meat thermometer to test doneness instead of relying solely on time.

Step-by-Step Roasting Method

Follow these easy steps for roasting beef perfection at 275°F:

1. Select a 3-6 lb roast, ideally with marbling.

2. Tie roast with cooking twine to maintain shape.

3. Season generously with salt, pepper and herbs.

4. Preheat oven to 275°F. Heat a skillet or pan to sear all sides.

5. Place roast in oven and cook until 15°F below target temp.

6. Rest roast 15-30 minutes before slicing across the grain.

And that’s all it takes! For ideal doneness, use the times in this article as a starting point and confirm with a meat thermometer.

Roasting Tips for Success

Implement these tips for the very best results when roasting at 275°F:

• Bring roast to room temp before cooking for faster, more even roasting.

• Use a thick, well-marbled roast for most flavor and tenderness.

• Sear or brown the outside first to develop a flavorful crust.

• Roast fat side up to allow self-basting with drippings.

• Use a meat thermometer to gauge perfect doneness, not just time.

• Allow roast to rest before slicing to retain juices.

• Roast meat bones or veggies like potatoes, carrots and onions alongside for extra flavor.

Common Roasting Problems Solved

Having trouble getting tender, evenly cooked roast beef? Here are some common issues and how to fix them:

Undercooked Roast: Raise oven temp 25°F and continue roasting until it reaches target internal temperature.

Overcooked, Dry Roast: Don’t overcook by more than 5°F above target temp – allow to rest before slicing.

No Crust: Always sear outside of roast first to develop caramelized crust before roasting.

Bland Flavor: Season aggressively with salt, pepper and use bold herbs like rosemary, garlic, etc.

Uneven Cooking: Rotate roast periodically and tent with foil if top browns too fast.

With the proper 275°F roasting time, a flavorful crust and a rested roast, you’ll achieve succulent results every time.

Mouthwatering Roast Beef Recipes to Try

Once you’ve mastered the roasting time, try these tasty roast beef entrees:

• Herb Crusted Roast Beef – coating of Dijon, rosemary, thyme and garlic.

• Roast Beef with Gravy – simple salt and pepper crust, served with rich gravy.

• Coffee and Chili Rubbed Roast – ancho chili, coffee, brown sugar and cumin.

• Roast Beef Tenderloin – quick yet elegant, cooks in under 1 hour.

• Roast Beef Sandwiches – pile sliced roast beef onto rolls with melty cheese.

The possibilities are endless for incredible roast beef meals. Follow my tips on the ideal roasting time and temperature, and you’ll achieve perfect results every time. Get ready to enjoy succulent, memorable roast beef straight from your oven.