Dinner · Part 3 of 3: Tips & recipe card

Crockpot Portobello Dijon Cream Beef Brisket Tips, FAQ & printable recipe

Name: Crockpot Portobello Dijon Cream Beef Brisket
Prep time: 10 min
Cook time: 8 h
Total time: 8 h 10 min
Cuisine: American
Ingredients: 3 1/2 lb beef brisket, trimmed; 8 oz portobello mushrooms, thickly sliced; 2 tbsp minced garlic; 1 cup sour cream; 1/4 cup whole-grain Dijon mustard; 1 cup beef au jus; Steamed white rice, for serving

By Clara Weller · Oct 28, 2026

Fork-tender shredded beef brisket in creamy Dijon sauce with portobello mushrooms, served in a slow cooker

Prep: 10 min
Cook: 8 h
Total: 8 h 10 min
Serves: 6

Tips for success

For the most flavorful gravy, use a good-quality beef au jus with a rich, savory taste. If you prefer a thicker sauce, whisk a tablespoon of cornstarch with a little cold water and stir it into the sauce during the last 30 minutes of cooking.

For an extra layer of flavor, add a splash of Worcestershire sauce or a sprig of fresh thyme with the au jus — though the video keeps it simple, these are optional additions for home cooks.

To make the dish even easier, prepare it the night before: layer all the ingredients in the slow cooker insert, cover, and refrigerate overnight. In the morning, place the insert in the cooker and turn it on low.

This also allows the flavors to meld before cooking. If you're short on time, you can cook on high for 5 to 6 hours, but low and slow will give you the most tender, shreddable meat.

Variations

Herb-Infused: Add 2 sprigs of fresh thyme and 1 sprig of rosemary with the au jus. The herbs infuse the sauce with aromatic notes that complement the Dijon and mushrooms. Remove the stems before serving.
Smoky Twist: Stir 1 teaspoon of smoked paprika into the sour cream before dolloping it over the brisket. The smoky flavor adds a subtle depth that pairs well with the beef and mushrooms.
Spicy Kick: Add 1 tablespoon of prepared horseradish or 1 teaspoon of hot sauce to the sour cream mixture. The heat cuts through the richness and brightens the sauce.
Vegetable Boost: Layer 2 large carrots, cut into chunks, and 1 large onion, sliced, under the brisket. They'll cook into the sauce and add sweetness and body. Serve the vegetables alongside the meat.

Storage and make-ahead

Fridge: Store leftovers in an airtight container in the refrigerator for up to 4 days. The sauce will thicken; add a splash of broth when reheating.
Freezer: Freeze the shredded brisket and sauce in a freezer-safe container for up to 3 months. Thaw overnight in the refrigerator before reheating.
Reheat: Reheat gently on the stovetop or in the microwave, adding a little beef broth or water to loosen the sauce. Warm until steaming hot throughout.

Leftovers can be stored in an airtight container in the refrigerator for up to 4 days. The flavors will continue to develop, and the sauce will thicken as it cools.

When reheating, add a splash of beef broth or water to loosen the sauce, and warm gently on the stovetop or in the microwave until hot. The dish is even better the next day, as the meat absorbs more of the sauce overnight.

This recipe is perfect for meal prep. Cook the brisket as directed, then let it cool completely. Portion it into containers with rice and extra gravy, and refrigerate for up to 4 days. You can also freeze the shredded brisket and sauce in a freezer-safe container for up to 3 months. Thaw overnight in the refrigerator before reheating.

Serving ideas

Serve the brisket over steamed white rice, egg noodles, or creamy polenta. The sauce is generous, so make sure to have something absorbent to soak it up. A side of roasted green beans or a crisp green salad with a bright vinaigrette balances the richness. For a low-carb option, serve over cauliflower rice or alongside sautéed spinach.

This dish also works well as a filling for tacos, sandwiches, or baked potatoes. Pile the shredded beef onto toasted buns with a little extra mustard, or stuff it into flour tortillas with pickled onions and fresh cilantro.

The creamy Dijon sauce pairs beautifully with the tangy toppings. Leftover brisket can be turned into a hearty hash with potatoes and onions the next morning.

Frequently asked questions

Can this recipe be made with a different cut of beef?

Yes, beef chuck roast is an excellent substitute for brisket. It has similar marbling and collagen content, so it becomes just as tender with the same low-and-slow cooking method. You can also use a bottom round roast, but it will be leaner and may require slightly less cooking time to avoid drying out.

Why does the sauce sometimes separate or curdle?

Sour cream can curdle if the slow cooker is set too high or if the dairy is added to a rapidly boiling liquid. To prevent this, always cook on low, and pour the au jus along the side of the pot rather than directly over the sour cream. Using full-fat sour cream also helps stabilize the sauce. If curdling happens, whisking the sauce vigorously can often bring it back together.

Can this be cooked on high instead of low?

Yes, the brisket can be cooked on high for 5 to 6 hours instead of 8 to 10 on low. However, the meat may not be quite as fork-tender, and the sauce might not reduce as much. For the best texture and flavor, low and slow is recommended.

Is it necessary to sear the brisket before adding it to the slow cooker?

No, searing is not necessary for this recipe. The long braise in the slow cooker breaks down the meat and creates deep flavor without the extra step. If you have time, searing the brisket in a hot skillet before adding it can add a nice crust, but it's completely optional.

Can this dish be made gluten-free?

Yes, the recipe can be made gluten-free by using a gluten-free beef au jus or substituting with gluten-free beef broth. Check the labels on the mustard and sour cream to ensure they are gluten-free, as some brands may contain additives. Serve with rice or gluten-free bread.

Recipe card

Crockpot Portobello Dijon Cream Beef Brisket

Prep 10 minCook 8 hTotal 8 h 10 minServes 6

Ingredients

3 1/2 lb beef brisket, trimmed
8 oz portobello mushrooms, thickly sliced
2 tbsp minced garlic
1 cup sour cream
1/4 cup whole-grain Dijon mustard
1 cup beef au jus
Steamed white rice, for serving

Instructions

Place the trimmed beef brisket flat into the bottom of a 6-quart slow cooker. It should fit snugly in a single layer, with the fat cap facing up if there is one. No need to sear — the slow cooker will do all the work. Let it rest for 3 minutes before slicing.
Scatter the thickly sliced portobello mushrooms over the brisket, then sprinkle the minced garlic evenly over the top. The mushrooms will shrink as they cook and release moisture into the sauce, so pile them on generously.
Spoon the sour cream over the mushrooms in dollops, then add the whole-grain Dijon mustard in spoonfuls. Don't stir — the slow cooker will blend them into the sauce as it simmers.
Pour the beef au jus along the side of the slow cooker, not directly over the sour cream and mustard. This keeps the dairy from curdling and lets the liquid settle at the bottom to create the braising base.
Cover the slow cooker and cook on low for 8 to 10 hours, until the brisket is fork-tender and easily shreds. The internal temperature should reach at least 145°F (63°C) for food safety, but it will rise well beyond that as it braises. Let it rest for 3 minutes before slicing.
When the brisket is fork-tender, transfer it to a cutting board and let it rest for at least 3 minutes. Then use two forks to shred the meat into bite-size pieces, discarding any large fat pieces.
Return the shredded brisket to the slow cooker with the mushrooms and sauce. Stir gently to coat everything in the velvety Dijon-cream gravy. Let it sit on warm for 10 minutes so the meat absorbs the sauce.
Spoon the shredded brisket and mushrooms over steamed white rice, then ladle extra gravy over the top. Serve hot, with the remaining sauce on the side.

Contains: milk, mustard, gluten

Estimated nutrition per serving

Calories: 520
Protein: 45 g
Carbohydrates: 18 g
Fat: 30 g

Automatic estimate from the ingredient list, not laboratory-verified.

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This recipe is based on a short cooking video and is published under the pen name Clara Weller. It was checked before publication, but errors can slip through. Nutrition, when shown, is an estimate. Read more in our editorial policy and on our food safety page.