Keto Roast Beef (Low and Slow, Just 2 Ingredients)

This is one of my favorite ways to transform a cheap cut of beef into something genuinely delicious. Keto roast beef is just season, roast, rest, and slice, nothing more complicated than that.

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I take big cuts like inside or outside round, top round, eye of round, sirloin, or even ribeye, and cook them low and slow for maximum flavor.

This stores beautifully too, in the fridge or the freezer, making it a genuinely great meal-prep option.

Chef Jenn’s Take on Roast Beef

Let the roast come to room temperature for at least an hour before it goes into the oven, rather than going straight from the fridge, it genuinely speeds up even cooking.

Cook low and slow at 275 degrees, uncovered, no lid needed, on a rack so air circulates underneath and you avoid a gray, overcooked outer layer. Use a real digital meat thermometer, do not guess, and pull it at 125 to 130 degrees for medium-rare. Rest for at least 15 to 20 minutes under loose foil before slicing, or the juices run out all over the cutting board instead of staying in the meat. A good, dark roasting pan with an insert makes life easier too, it lifts the roast off the bottom of the pan for even more even cooking.

A coarse steak seasoning blend of salt, pepper, and garlic is genuinely my go-to here, simple and effective. Cold meat slices much more thinly and evenly than warm, especially if you are using a meat slicer for sandwich-style slices. Roast beef freezes beautifully too, up to 6 months, longer than most other things in the freezer.

What You’ll Love About Roast Beef

• Freezes beautifully, a great meal-prep option for sandwiches and more.
• Just season, roast, rest, and slice, nothing complicated about it.
• Turns a cheap cut of beef into something genuinely delicious.

Ingredients

• Beef roast – Inside/outside round, top round, eye of round, sirloin, or ribeye. You don’t want anything that needs braising
• Seasoning – I use Montreal Steak Spice

How Long Do I Cook Keto Beef Roast?

The cooking time is going to depend on a few different things, like what temperature the roast is when you put it in the oven. I try to let mine sit at room temperature for at least an hour rather than transferring it straight from the fridge to the oven, which speeds up the cooking time.

That being said, the size of your cut is always going to be the biggest factor. That’s why a digital meat thermometer is a great tool to use. For reference, my 5-pound roast took about two hours to reach 125-130-F. 

You can also use this handy chart when deciding how long to roast the beef. These times are JUST GUIDELINES. Always temp your roast with a digital meat thermometer. Cooking times will be different depending on how cold your roast is when you put it in the oven, what kind of cut it is, how close it is to the heat, and so on.

Medium Rare (130-F)	2 lb roast	1.5 hours
	3 lb roast	2 hours
	4-5 lb roast	2-3 hours
Medium (145-F)	2 lb roast	1.5-2 hours
	3 lb roast	2-2.5 hours
	4-5 lb roast	2.5-3 hours

Make it a Meal

Roast beef goes with so many delicious keto side dishes. I like to serve mine with a side of Keto Cauliflower Mash or Brussels Sprouts with Almonds & Brown Butter. Or, to keep things lighter, I like this Kachumbari (East African Tomato and Onion Salad). Looking for a good beefy sauce to go with your meal? Serve your roast with this au jus.

Storage

Roast beef freezes beautifully, up to 6 months when stored properly. Wrap the cooked meat in foil or plastic wrap, then place it in a gallon freezer bag or sealable container before freezing.

Frequently Asked Questions

Hungry for Even More Easy Keto Recipes?

Here are some of my all-time favorite keto recipes:

• Grilled vegetables
• Salmon chowder
• Hearty Minestrone Soup
• Keto Corned Beef Hash
• and if you need help counting carbs, this Net Carb Calculator can help!