A three-pound chuck roast, seared in a skillet and then given eight hours on LOW over two sliced onions and three quarters of a pound of cremini mushrooms.
The braising liquid becomes the gravy in the last quarter of an hour, thickened with a cornstarch slurry on HIGH while the beef rests.
Why This Recipe Works
- Chuck rather than a lean roasting joint. It carries the connective tissue that eight hours on LOW turns to gelatin, which is why the meat pulls into large soft pieces instead of drying into slices.
- The vegetables go in underneath. Two large sliced onions and twelve ounces of mushrooms make a rack that keeps the roast above the liquid, so its seared surface braises rather than boils.
- Twelve ounces of mushrooms is a lot, and it should be. Mushrooms lose most of their volume in a long braise; a smaller quantity would read as a garnish rather than as half the gravy.
- Only a cup and a half of broth for a three-pound roast. Onions and mushrooms release a great deal of liquid over eight hours, and a cooker started wetter than this finishes with gravy too thin for two tablespoons of cornstarch to save.
- Worcestershire and low-sodium broth together. The Worcestershire brings the salt and the savoury depth, which is exactly why the broth underneath it is the low-sodium kind.
Three Heats, In Order
Eight of the eight and a half hours are hands-off, which hides the fact that this recipe uses three quite different heats. Each one does something the next cannot.
Sear, hard and dry3 to 4 minutes per side
Olive oil in a skillet over medium-high, the seasoned roast browned on both sides. This is the only browning the beef will get — a slow cooker has no surface hot enough to build crust, and the colour here is where the gravy's depth comes from.
Braise, low and longLOW, about 8 hours, to fork-tender
Onions, mushrooms and garlic go in first and the roast sits on top of them, so the vegetables hold it out of the liquid and give off their own. Broth, Worcestershire and thyme, then the lid.
Thicken, fast and highHIGH, 10 to 15 minutes
The roast comes out and rests loosely covered. Cornstarch whisked into cold water goes into the pot on HIGH — cold water first, always, because cornstarch tipped into hot liquid seizes into lumps that never whisk out.
Ingredient Notes
- Boneless beef chuck roast
- Three pounds, boneless. Chuck is chosen for its collagen; a sirloin or round roast of the same weight will be dry at hour eight rather than tender.
- Cremini mushrooms
- Twelve ounces, sliced. Cremini hold their shape and their flavour through eight hours where white button mushrooms mostly surrender both.
- Yellow onions, thinly sliced
- Two large, sliced thin so they collapse into the gravy rather than staying as rings. They are structure at the start and body at the end.
- Cornstarch and cold water
- Two tablespoons each, whisked together before they go anywhere near the pot. The cold water is the whole point of the pairing.
- Low-sodium beef broth
- A cup and a half, and low-sodium deliberately — two tablespoons of Worcestershire reduce down over eight hours and a salted broth underneath them finishes harsh.
How to Make It
Season the roast
Season the roast with salt and pepper.
Brown it
Heat the olive oil in a large skillet over medium-high heat and brown the roast for 3 to 4 minutes per side.
Build the cooker
Add the onions, mushrooms and garlic to a 6-quart slow cooker and place the roast on top.
Add the liquid
Pour in the beef broth and Worcestershire sauce and sprinkle with thyme.
Cook on LOW
Cover and cook on LOW for about 8 hours, until the beef is fork-tender.
Rest the beef
Transfer the roast to a platter and loosely cover it.
Thicken the gravy
Whisk the cornstarch with cold water. Stir the slurry into the slow-cooker liquid, cover and cook on HIGH for 10 to 15 minutes, until the gravy thickens.
Serve
Slice or pull the beef into large pieces and serve with the mushroom-onion gravy.
Success Tips
- Get the skillet properly hot before the roast goes in; a lukewarm pan greys the surface instead of browning it.
- Build the cooker in the stated order — vegetables first, roast on top of them.
- Resist lifting the lid during the eight hours; each look costs real heat.
- Whisk the cornstarch into cold water only, never straight into the pot.
- Let the beef rest under a loose cover while the gravy thickens rather than holding it in the liquid.
Serving Ideas
Mashed potato or buttered egg noodles, because the gravy is the point and both carry it. Pulled into large pieces it also makes a very good open sandwich on soft rolls.
Storage and Reheating
Refrigerate
Refrigerate beef and gravy together in an airtight container for up to 4 days. Keeping the meat in the gravy is what stops it drying out.
Freeze
Freeze beef and gravy together for up to 3 months. Cornstarch-thickened gravy can thin slightly on thawing; a minute at a simmer brings it back.
Reheat
Reheat gently in a covered pan over low heat, or in the slow cooker on LOW. High heat tightens shredded chuck and undoes eight hours of work.
Frequently Asked Questions
Do I have to brown the roast first?
It is the difference between a brown gravy and a grey one. Nothing in a slow cooker gets hot enough to build that crust later, so the three or four minutes a side is not a step you can recover.
My gravy did not thicken.
Either the slurry went in on LOW rather than HIGH, or it did not get the full 10 to 15 minutes. Cornstarch needs real heat to set, and the lid stays on while it does.
Can I cook it on HIGH for half the time?
You will get cooked beef, but not the same beef. Chuck's collagen needs long, gentle heat to turn to gelatin, and that is what makes it fork-tender rather than merely done.
The gravy came out lumpy.
The cornstarch met hot liquid before it met cold water. Whisk the two tablespoons of cornstarch into two tablespoons of cold water first, then stir that slurry into the pot.
