3-Ingredients French Onion Brisket
There’s something wonderfully old-fashioned about a brisket that spends hours cooking in a savory onion sauce. This 3-Ingredients French Onion Brisket keeps things especially simple: beef brisket, French onion soup, and dry onion soup mix are all you need to get a deeply savory, tender dinner on the table.
The brisket cooks low and slow until it’s soft enough to slice with very little resistance. The onion-rich cooking liquid becomes a flavorful sauce around the meat, with plenty of savory depth despite the short ingredient list.
This is the kind of recipe I’d make for Sunday dinner, a family gathering, or a holiday meal when I want something hearty without spending the afternoon chopping and measuring a long list of ingredients.

Why It Works
The trick is letting time do the work. Brisket is a naturally tough cut, so gentle cooking gives the connective tissue plenty of time to break down and leaves the meat tender and juicy.
French onion soup provides moisture and concentrated onion flavor, while the dry onion soup mix adds seasoning and extra savory flavor. Since both ingredients contain salt, there’s no need to add much, if any, additional seasoning.
For the cleanest slices, let the brisket rest before cutting it and always slice against the grain. That small detail makes a noticeable difference in how tender each bite feels.
Ingredients You’ll Need
Beef Brisket
Use a 3½- to 4½-pound beef brisket, preferably the first-cut flat if you want neat slices. A whole brisket works, too, but may need a little more cooking time.
Trim away excessive surface fat, leaving a thin layer to help keep the meat moist as it cooks.
French Onion Soup
You’ll need 2 cans of condensed French onion soup. Don’t dilute it with water. The concentrated soup becomes part of the braising liquid and creates the savory onion sauce.
Dry Onion Soup Mix
One 1-ounce packet of dry onion soup mix seasons the brisket and adds plenty of onion flavor without requiring any chopping.

FAQs
Can I Make This In A Slow Cooker?
Yes. Place the brisket in the slow cooker, pour over the French onion soup, and sprinkle with the onion soup mix. Cook on LOW for about 8–9 hours, or until the brisket is fork-tender.
Should I Sear The Brisket First?
You can, but it isn’t necessary for this three-ingredient version. Searing adds a browned, roasted flavor, but the long braising time and onion-rich sauce already give the brisket plenty of flavor.
Can I Use A Different Cut Of Beef?
Brisket is ideal because it becomes tender during long, slow cooking. A chuck roast can also work, although the texture will be more like pot roast.
Why Is My Brisket Tough?
It probably needs more time. Brisket can become tender very quickly once the connective tissue has sufficiently broken down, but that point varies from one piece of meat to another.
Can I Make The Brisket Ahead?
Absolutely. In fact, brisket is excellent made a day ahead. Once chilled, the meat is easier to slice neatly, and the flavors have more time to settle together.
Do I Need To Add Salt?
I’d wait until after cooking. The French onion soup and onion soup mix are both already seasoned, so additional salt can easily make the finished dish too salty.

This 3-Ingredients French Onion Brisket is an easy, flavorful dinner made with just a few simple ingredients. The brisket turns tender and juicy as it cooks, with rich French onion flavor in every bite. It’s the perfect cozy meal for busy weeknights or a comforting family dinner.
WW French Onion Beef Brisket
Ingredients
- 2½ lb (1.1 kg) lean beef brisket, trimmed of visible fat
- 1 packet (1 oz / 28 g) dry French onion soup mix
- 1 can (10.5 oz / 298 g) reduced-fat or low-sodium condensed French onion soup
- ½ cup water
- Black pepper, to taste
Instructions
- Preheat the oven to 325°F (165°C).
- Trim all visible fat from the brisket and season lightly with black pepper.
- Place the brisket in a large baking dish or Dutch oven.
- Mix the French onion soup mix, condensed French onion soup, and water in a bowl.
- Pour the mixture evenly over the brisket.
- Cover tightly with foil or a lid and bake for about 3–3½ hours, or until the beef is very tender.
- Remove from the oven and let the brisket rest for 15–20 minutes.
- Slice thinly against the grain and spoon some of the onion sauce over the top.
WW Tip: Trim the brisket well and use a reduced-fat/lower-sodium condensed soup to reduce calories and Points. Portion the beef carefully because brisket can still be relatively high in Points.