This Instant Pot version delivers the same fork-tender results as the slow cooker original in a fraction of the time. The secret lies in pressure cooking, which breaks down the chuck roast while infusing it with the bold flavors of ranch seasoning, au jus mix, and pepperoncini peppers.
What emerges is melt-in-your-mouth beef with a tangy, slightly spicy kick from the peppers. The sauce thickens naturally into a rich gravy that soaks into every bite. Simple ingredients, professional results.
Ingredients for Mississippi Pot Roast Recipe Instant Pot
Simple ingredients deliver fork-tender beef with bold, tangy flavor in record time.
| Ingredient | Amount | Notes |
|---|---|---|
| Chuck Roast 🥩 | 3 lb | Boneless, cut into large chunks |
| Ranch Seasoning Mix 🌿 | 1 package | 1 oz packet, dry |
| Au Jus Mix 🥣 | 1 package | 1 oz packet, dry |
| Pepperoncini Peppers 🌶️ | 8 pieces | Including liquid from jar |
| Unsalted Butter 🧈 | ½ cup | 1 stick, sliced into pats |
| Beef Broth 🥣 | 1 cup | Low-sodium preferred |
| Yellow Onion 🧅 | 1 whole | Peeled and quartered |
| Garlic Cloves 🧄 | 4 cloves | Peeled and smashed |
| Carrots 🥕 | 3 whole | Peeled and chopped into chunks |
| Russet Potatoes 🥔 | 3 whole | Peeled and quartered |
| Worcestershire Sauce 💧 | 2 tbsp | Optional for depth of flavor |
| Dijon Mustard 🟡 | 1 tbsp | For tangy richness |
| Kosher Salt 🧂 | 1 tsp | Adjust to taste |
| Black Pepper 🌶️ | 1 tsp | Freshly ground preferred |
The chuck roast is non-negotiable here. Look for well-marbled cuts—this fat renders down during pressure cooking, creating that melt-in-your-mouth texture. Costco and Sam’s Club offer great value for large roasts you can portion yourself. Ranch and au jus mixes are pantry staples, but check the labels for hidden MSG if that’s a concern.
Out of pepperoncini? Banana peppers work in a pinch, though they’re milder. No ranch mix? 1 tbsp dried dill + 1 tsp each garlic powder, onion powder, and parsley makes a decent substitute. Beef broth can be swapped for mushroom broth if you want extra depth. The butter is key for richness—don’t substitute oil here.
Leftover roast keeps beautifully. Store in an airtight container in the fridge for up to 5 days, or freeze for 3 months. The flavors actually deepen overnight. Reheat gently on the stove with a splash of broth to revive the sauce.
Why You’ll Love This Recipe
- Dump and Go: I literally toss the chuck roast, ranch mix, au jus, and pepperoncinis into the Instant Pot—no pre-browning, no fuss.
- Ridiculously Tender: The butter and pepperoncini juice turn the roast so fall-apart tender it barely needs a fork.
- Feeds a Crowd: One chuck roast makes enough for Sunday dinner, plus leftovers for sandwiches all week.
- Budget Friendly: A tough, cheap cut becomes melt-in-your-mouth good with five ingredients and 45 minutes.
Step-by-Step Instructions for Mississippi Pot Roast in an Instant Pot
Here’s the method. Straightforward, tested, works every time.
Step 1: Sear the Chuck Roast for Deep Flavor
Set your Instant Pot to the Sauté function on Normal/Medium Heat. When the display reads Hot, add the 0.5 cup Unsalted Butter and let it melt. Pat the 3 lb Chuck Roast dry with paper towels, then season all over with the 1 tsp Kosher Salt and 1 tsp Black Pepper.
Working in batches if needed, sear the chuck roast on all sides for 3-4 minutes per side until deeply browned. This step builds a rich fond that will intensify the flavor of your pot roast. Transfer the seared chuck roast to a plate and set aside.
Step 2: Sauté Aromatics and Deglaze the Pot
In the same pot, add the quartered 1 whole Yellow Onion, 4 cloves Garlic Cloves, 3 whole Carrots (peeled and chopped into chunks), and 3 whole Russet Potatoes (peeled and quartered). Sauté for 3-4 minutes until the onions begin to soften.
Stir in the 2 tbsp Worcestershire Sauce and 1 tbsp Dijon Mustard, scraping the bottom of the pot to release any browned bits. Pour in the 1 cup Beef Broth and deglaze the pot, ensuring all the flavorful residue is incorporated into the liquid.
Step 3: Layer in Seasonings and Pressure Cook
Return the seared chuck roast to the Instant Pot, placing it on top of the vegetables. Sprinkle the 1 package Ranch Seasoning Mix and 1 package Au Jus Mix evenly over the chuck roast. Add the 8 pieces Pepperoncini Peppers along with their liquid from the jar, distributing them around the roast.
Secure the lid on the Instant Pot and set the valve to Sealing. Cook on High Pressure for 60 minutes. The pot roast will be fork-tender and the flavors beautifully melded when done.
Step 4: Natural Release and Rest
Allow the pressure to release naturally for 15 minutes, then carefully switch the valve to Venting to release any remaining pressure. Open the lid and let the pot roast rest in the liquid for 5-10 minutes to absorb the flavors.
The chuck roast should be incredibly tender, easily pulling apart with a fork. The vegetables will be soft and infused with the rich, savory broth. Serve the pot roast and vegetables with some of the cooking liquid spooned over the top.
Pro Tips For Making Mississippi Pot Roast Recipe Instant Pot
- Sear the Chuck: Take 5 extra minutes to sear the chuck roast in the Instant Pot before pressure cooking—I learned this the hard way when my first few attempts lacked that deep, caramelized flavor.
- Don’t Skip the Juice: Pour in the liquid from the pepperoncini jar, about ½ cup, along with the peppers. Sounds weird, but it works: the tang cuts through the richness of the butter and ranch.
- Use Room-Temp Butter: Let the unsalted butter soften for 30 minutes before adding it on top of the seasoning mixes. My grandmother swore by this, and she was right: it blends into the sauce instead of sitting in a hard clump.
- Natural Release Only: Resist the urge to quick-release the pressure. After burning a batch by rushing it, I now always let the Instant Pot sit for a full 15-minute natural release to keep the meat fork-tender.
Perfect Pairings for This Dish
Side Dishes
This rich, savory Mississippi pot roast pairs beautifully with sides that soak up its juices. Try creamy mashed potatoes or buttery egg noodles for a comforting, hearty meal. For a lighter option, roasted carrots or green beans add a fresh contrast to the bold flavors. 🥘
Drink Pairings
A full-bodied Cabernet Sauvignon or Merlot complements the roast’s depth, while a crisp lager or iced tea balances the pepperoncini tang. For a non-alcoholic twist, sparkling lemonade adds a refreshing zing. 🍷
Complementary Flavors
Enhance the meal with crusty garlic bread or a sharp cheddar cheese platter. The roast’s au jus also shines over a simple side salad with a tangy vinaigrette. A sprinkle of fresh parsley or chives adds a pop of color and freshness. ✨
Nutrition Facts
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