The Short Version
A classic slow cooker pot roast is a boneless beef chuck roast (about 3 to 4 pounds), onions, carrots, potatoes and some beef broth, cooked covered on low for roughly 8 to 10 hours. The exact time depends on the size of the roast and your cooker, so the real test is texture: the meat should pull apart easily with a fork.
Below is a base recipe, followed by the choices that make the biggest difference.
Choosing the Cut
Chuck roast is the usual choice. It has plenty of connective tissue and fat, which break down during long, moist cooking and leave the meat tender and rich. Leaner cuts such as round, rump or London broil can work, but they are less forgiving and tend to turn out drier. If you are cooking one of those, see our guides to slow cooker rump roast and slow cooker London broil. For a deeper look at the cut most people reach for, read our chuck roast in the slow cooker guide.
Ingredients
- 1 boneless beef chuck roast, 3 to 4 pounds
- 1 to 2 tablespoons oil, if searing
- Salt and black pepper
- 1 large onion, cut into wedges
- 3 to 4 cloves garlic
- 1 pound carrots, cut into thick chunks
- 1.5 to 2 pounds potatoes, such as Yukon Gold, cut into large chunks
- 1 to 1.5 cups beef broth
- 1 tablespoon Worcestershire sauce
- A few sprigs of thyme or rosemary, or 1 packet onion soup mix (optional)
Use less liquid than you think you need. The meat and vegetables release juices as they cook, and a slow cooker traps moisture, so a cup or so of broth is usually plenty.
Step-by-Step Method
- Pat the roast dry and season it generously with salt and pepper.
- Optional: sear the roast in a hot skillet for a few minutes per side until browned.
- Put the onion and garlic in the bottom of the slow cooker, then set the roast on top.
- Pour in the broth and Worcestershire sauce and add herbs.
- Cover and cook on low until the roast is nearly tender (see timing below).
- Add the carrots and potatoes, nestled around the meat, and keep cooking until they are tender and the meat shreds easily.
- Move the meat and vegetables to a platter and let the roast rest briefly before serving.
How Long Should Pot Roast Cook?
For a 3 to 4 pound chuck roast, many recipes land at about 8 to 10 hours on low, or roughly 4 to 6 hours on high. Treat those as ranges. Slow cookers vary, and a thicker roast takes longer than a flat one.
Low is generally the gentler option for tough cuts. Cooking on high can work in a pinch, but the meat is more likely to turn out stringy. Whichever setting you use, avoid lifting the lid more than necessary, since each peek lets heat escape and can add time.
To Sear or Not to Sear
Searing adds a deeper, roasted flavor, but it is optional. If you are short on time, skipping it still gives you a tender roast; it will just taste a little milder and look paler. If you do sear, deglaze the skillet with a splash of broth and pour that into the cooker so the browned bits are not wasted.
Keeping Vegetables From Turning to Mush
Potatoes and carrots that cook for 8 to 10 hours can fall apart. Cutting them into large chunks helps. For a firmer result, add them partway through the cook time rather than at the start. If you prefer the vegetables very soft and infused with beef flavor, put them in the bottom of the cooker at the beginning.
Making Gravy
Strain the cooking juices into a saucepan and skim off excess fat. Bring to a simmer and whisk in a slurry of 1 tablespoon cornstarch mixed with 2 tablespoons cold water, then simmer a minute or two until thickened. Taste before adding salt, since broth and seasoning mixes can already be salty.
Variations
- Mississippi style: a tangy, buttery version with pepperoncini and seasoning packets. See our slow cooker Mississippi pot roast.
- Creamy or ranch-style: some regional recipes add cream cheese or ranch seasoning to make a richer gravy. Stir cream cheese into the hot cooking liquid near the end, off the heat or on low, until smooth.
- Salt-cured brisket: corned beef uses a different cut and treatment, so follow its own timing in our crock pot corned beef guide.
Why Pot Roast Turns Out Tough
It sounds backwards, but a tough pot roast is often undercooked, not overcooked. Chuck needs enough time for its connective tissue to soften. If the roast resists a fork, cover it and keep cooking, checking every 30 to 60 minutes. A roast that is dry and stringy may have been cooked too hot, on too lean a cut, or without enough moisture. Slicing or shredding it and moistening it with the cooking juices usually helps.
Storing and Reheating
Refrigerate leftovers within about two hours of cooking, in shallow containers with some of the juices. They generally keep for three to four days in the fridge. Reheat until steaming hot throughout. Pot roast also freezes well in its juices for a few months. Shredded leftovers are a good base for sandwiches, tacos or soup, which makes this a handy meal prep dish.
FAQ
Do I need to add liquid? Yes, a modest amount. The cooker needs some liquid to create steam, but the roast should not be submerged.
Can I use a frozen roast? It is generally recommended to thaw the roast first so it heats through evenly and quickly enough.
Can I put the roast in raw? Yes. Searing is optional, and raw meat can go straight into the cooker.
What is the best way to slow roast beef? Low heat, a moist environment, enough time and a cut with plenty of connective tissue, like chuck.