What cut of beef works best?

Chuck roast is ideal. It’s affordable, easy to find, and becomes incredibly tender under pressure.

What can I use instead of au jus mix?

Brown gravy mix or onion soup mix works well. You can also make a homemade substitute using beef bouillon, onion powder, garlic powder, parsley, and cornstarch.

What can I substitute for pepperoncini peppers?

Pickled banana peppers are the closest match. If you don’t have peppers at all, use a splash of pickle juice or apple cider vinegar.

Can I add vegetables?

Yes — add potatoes, carrots, or mushrooms during the last 5–6 minutes of pressure cooking so they don’t overcook.

Can I use frozen beef?

Yes. Take the frozen beef straight out of the freezer, skip searing, and add 10 extra minutes to the pressure cook time.

Can I make this in the slow cooker?

Absolutely. Sear the beef first, then cook on low for 8–10 hours or high for 4–5 hours.

Can I make this in the oven?

Yes, you can. Start by searing the pot roast in a skillet to build flavor. Transfer it to a Dutch oven or deep baking dish, add the remaining ingredients, and cover tightly. Bake at 300°F for about 1 hour per pound.

Instant Pot Mississippi Pot Roast

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This high-pressure beef roast is a savory, tender meal that requires minimal preparation. It combines rich buttery flavors with a tangy kick, making it an ideal low-carb dinner for busy weeknights.

List of ingredients

3-4 pounds beef (chuck roast) – choose a well-marbled cut for tenderness.
1 tablespoon olive oil – used for searing the meat.
1 teaspoon ground pepper – for basic seasoning.
1 large yellow onion, diced – adds savory depth to the sauce.
1 cup beef broth – used for deglazing and moisture.
1 (1 oz) packet of Ranch Dressing Mix (approx. 1.5 tablespoon) – provides herby tang.
1 (1 oz) packet of Au Jus Gravy Mix (approx. 1.5 tablespoon) – adds rich beefy flavor.
4 tablespoons unsalted butter – creates a velvety gravy.
5-6 pepperoncini peppers and 1/4 cup of its juice – provides acidity and zest.
1 tablespoon cornstarch and 1 tablespoon water – optional for thickening the gravy.

step-by-step instructions

Season the Beef: Rub 1 teaspoon of ground pepper generously on both sides of the 3-4 pound chuck roast.
Sear the Meat (Optional): Set the Instant Pot to [Sauté] mode. Once hot, add 1 tablespoon olive oil and sear the roast for about 3 minutes per side until golden brown. If skipping this, add 2-3 minutes to the pressure cooking time.
Sauté the Onion: Remove the beef from the pot. Add the diced yellow onion and cook for about 2 minutes until tender.
Deglaze the Pot: Pour in 1 cup of beef broth. Use a spoon to scrape all browned bits from the bottom to avoid a burn warning.
Layer the Ingredients: Place the beef back into the pot. Sprinkle the Ranch dressing mix and Au Jus mix evenly over the top. Add the unsalted butter, pepperoncini peppers, and pepperoncini juice.
Pressure Cook the Roast: Close the lid and set the valve to “Sealing.” Use [Pressure Cook/Manual] on High Pressure for 60 minutes for a 3lb roast or 70 minutes for a 4lb roast.
Natural Pressure Release: Allow the pressure to release naturally for 10-15 minutes. Open the lid only after the pressure pin drops.
Thicken the Gravy (Optional): Remove the beef. Mix 1 tablespoon cornstarch with 1 tablespoon water. Set the pot to [Sauté] and whisk in the slurry for 1-2 minutes until thickened.
Serve: Shred the beef using two forks, drizzle with the finished gravy, and serve with sides.

Professional Tips for Maximum Tenderness

Select a Well-Marbled Chuck Roast

Look for beef with significant white intramuscular fat streaks. This fat melts during the pressure cooking process, basting the meat from the inside. Leaner cuts can become dry and stringy under high pressure.

Leverage the Maillard Reaction

Searing the meat before pressure cooking creates a browned crust through the Maillard reaction. This step adds complex, savory flavor notes that cannot be achieved through pressure cooking alone. It significantly enhances the overall depth of the gravy.

Prevent the Burn Error Through Deglazing

The “Burn” warning occurs when food particles stick to the bottom of the inner pot. Adding beef broth and scraping the bottom thoroughly ensures these particles are incorporated into the liquid. This protects the sensor and improves the flavor of the sauce.

Prioritize a Natural Pressure Release

Avoid using the quick-release valve immediately after the timer ends. A natural release allows the muscle fibers to relax and retain their juices. Quick releasing can cause the meat to toughen as moisture is forced out rapidly.

Customizing Your Pot Roast

Adjusting the Seasoning Mixes

If you lack Au Jus mix, brown gravy mix or onion soup mix are suitable alternatives. These provide the necessary salt and savory base. You can also make a homemade blend using beef bouillon and garlic powder.

Substituting Pepperoncini Peppers

Pickled banana peppers offer a very similar tang and mild heat. If no pickled peppers are available, a tablespoon of apple cider vinegar or pickle juice can provide the necessary acidity. This acidity is crucial for breaking down the beef fibers.

Incorporating Root Vegetables

Add chunks of potatoes, carrots, or parsnips to the pot for a complete meal. To prevent them from becoming mushy, add them during the last 5-6 minutes of cooking. Use the sauté mode or a quick pressure burst if adding them after the main roast is done.

Cooking from Frozen Beef

You can cook the roast directly from the freezer by skipping the searing step. Increase the high-pressure cooking time by 10 minutes to ensure the center reaches a safe temperature. Ensure there is enough liquid in the pot to maintain pressure.

Serving and Pairing Suggestions

Classic Starch Pairings

Serve the shredded beef over creamy mashed potatoes or buttered egg noodles. These options are excellent for soaking up the rich, buttery gravy. Rice is another practical choice for a hearty meal.

Low-Carb Side Options

Pair this roast with cauliflower mash or sautéed zucchini for a ketogenic-friendly dinner. Steamed broccoli or roasted Brussels sprouts add a fresh, crisp contrast to the richness of the beef. A simple side salad with a vinaigrette also works well.

Best Bread for Dipping

Serve the dish with toasted sourdough or a crusty baguette. The porous nature of these breads allows them to absorb the tangy pepperoncini-infused gravy. Garlic bread is another popular choice for adding extra flavor.

Storage and Reheating Guidelines

Proper Refrigeration Methods

Store the cooked beef and gravy together in an airtight glass or plastic container. This keeps the meat moist and prevents it from oxidizing. The roast will stay fresh in the refrigerator for up to 4 days.

Freezing for Long-Term Use

Freeze the beef in individual portions with a generous amount of gravy. Use freezer-safe bags and squeeze out all the air to prevent freezer burn. These portions can be stored for up to 3 months.

Optimal Reheating Techniques

Reheat the beef in a skillet over medium-low heat with a splash of beef broth. This prevents the meat from drying out and restores the consistency of the gravy. Avoid high-power microwave settings which can make the beef rubbery.

Creative Leftover Applications

Savory Beef Sandwiches

Pile the shredded beef onto a toasted brioche bun with a slice of provolone cheese. Melt the cheese under a broiler for a few minutes. Add a few extra pepperoncini slices for added crunch.

Beef Tacos and Wraps

Use the roast as a filling for warm corn or flour tortillas. Top with fresh avocado, diced white onions, and a squeeze of lime. The tangy gravy replaces the need for heavy sauces.

Shepherd’s Pie Base

Layer the leftover beef and gravy at the bottom of a baking dish. Top with a thick layer of mashed potatoes and bake until the top is golden brown. This transforms the roast into a complete casserole meal.

Hearty Breakfast Hash

Sauté the beef with cubed fried potatoes, bell peppers, and onions in a cast-iron skillet. Cook until the potatoes are crispy and the beef is heated through. Serve with a poached or fried egg on top.

Frequently Asked Questions

Which cut of beef is best for this recipe?

Chuck roast is the ideal choice because it contains a high amount of connective tissue and fat. Under pressure, this tissue breaks down into gelatin, resulting in a tender, shreddable texture.

Is Mississippi Pot Roast very spicy?

No, the dish is generally mild. Pepperoncini peppers provide a vinegary tang and a very slight heat, but they do not make the dish spicy. You can control the heat by adjusting the number of whole peppers used.

Can I make this in a slow cooker?

Yes, the ingredients work perfectly in a slow cooker. Sear the meat first, then cook on low for 8-10 hours or on high for 4-5 hours. Ensure the pot is tightly sealed to keep the moisture in.

Can I cook this in a conventional oven?

Yes, sear the beef in a skillet first and then transfer it to a covered Dutch oven. Bake at 300°F for approximately one hour per pound of meat. Ensure the pot is tightly covered with a lid or foil to prevent evaporation.