Mississippi Pot Roast Instant Pot McCormick Recipe: Set-It-and-Forget-It Savory Feast

This Instant Pot version of the classic Mississippi pot roast delivers all the rich, savory flavors with minimal effort. The pressure cooker transforms tough beef into tender, fall-apart perfection in just a fraction of the time.

McCormick seasonings provide the perfect blend of herbs and spices to create that signature pepperoncini-infused flavor profile. The recipe combines ranch dressing mix, au jus gravy, and pepperoncini peppers for a tangy, savory depth that makes this dish unforgettable.

You’ll achieve the same incredible results as the slow-cooked original, but in under 2 hours instead of all day. The meat becomes so tender it practically melts in your mouth, while the sauce develops a rich, complex character.

Perfect for a comforting family dinner or Sunday supper, this set-it-and-forget-it method ensures consistent, restaurant-quality results every time.

Ingredients for Mississippi Pot Roast Instant Pot Mccormick

Tender beef, tangy peppers, and McCormick magic create this unforgettable dish with ease.

The beef is the foundation here—chuck roast with good marbling (from Costco or your local butcher) transforms into that signature fall-apart texture. I always grab McCormick’s original ranch and au jus packets (sold in the spice aisle) for that authentic flavor. The pepperoncini peppers? Look for Mezzetta brand in the pickles section—they’ve got the perfect tangy bite without being too spicy.

No chuck roast? Brisket or bottom round work in a pinch (just add 10 minutes to the cook time). Swap the butter for olive oil if you’re avoiding dairy. Out of pepperoncini? Banana peppers at half the amount give a milder kick. The Worcestershire sauce is key for depth—Annie’s or Lea & Perrins are solid choices. Fresh out of beef broth? Water plus a bouillon cube saves the day.

Leftovers taste even better the next day—store sealed in the fridge for up to 4 days or freeze for 3 months. The sauce thickens as it cools, so thin with a splash of broth when reheating. Perfect for meal prep (trust me, you’ll want seconds).

Step-by-Step Instructions for Mississippi Pot Roast Instant Pot

This foolproof method delivers fall-apart tender beef with minimal hands-on time.

Step 1: Sear and Season the Beef Chuck Roast

Set your Instant Pot to the sauté function on high heat. Pat the 3 lb Beef Chuck Roast dry with paper towels, then season generously with the 1 tsp Kosher Salt and 0.5 tsp Black Pepper. When the pot is hot, add 1 tablespoon of the 0.5 cup Unsalted Butter and sear the roast on all sides until deeply browned—about 4-5 minutes per side.

This searing step builds a flavorful fond that will enrich your sauce later. Don’t rush it; you want a dark, caramelized crust on every surface. Transfer the roast to a plate and set aside.

Step 2: Build the Flavor Base in the Instant Pot

Add the remaining unsalted butter to the pot, then toss in the 1 whole Yellow Onion (quartered), 4 cloves Garlic Cloves (smashed), and 0.5 cup Pepperoncini Peppers. Sauté for 2-3 minutes until the onions soften and the garlic becomes fragrant.

Stir in the 1 package McCormick Ranch Dressing Mix, 1 package McCormick Au Jus Gravy Mix, and 1 tbsp Worcestershire Sauce. This trio creates the signature tangy, savory profile. Pour in the 1 cup Beef Broth and scrape the bottom of the pot to release any browned bits.

Step 3: Pressure Cook to Tender Perfection

Return the beef chuck roast to the Instant Pot, along with any accumulated juices from the plate. Secure the lid, set the valve to sealing, and cook on high pressure for 60 minutes. The pot will take about 10-15 minutes to come to pressure before the timer starts.

Once the cooking time is complete, allow the pressure to release naturally for 15 minutes, then quick-release any remaining pressure. This natural release prevents the roast from seizing up and ensures maximum tenderness.

Step 4: Shred and Thicken the Sauce

Remove the beef chuck roast to a cutting board and shred it using two forks—it should pull apart effortlessly. If you prefer a thicker sauce, set the Instant Pot to sauté again and whisk in the 2 tbsp All-Purpose Flour with 2 tablespoons of reserved cooking liquid to create a slurry. Stir until the sauce reaches your desired consistency.

Return the shredded beef to the pot and toss it in the rich, tangy sauce. The roast is ready when every bite is coated and the flavors meld beautifully. Let it sit for 5 minutes before serving to allow the sauce to soak into the meat.

Make-Ahead Tips for This Recipe

Overnight Prep

You can prep all ingredients the night before—slice the pepperoncini peppers, quarter the yellow onion, and smash the garlic cloves. Store them in airtight containers in the fridge. This saves 15-20 minutes on cooking day. 💡

Morning Assembly

In the morning, sear the 3 lb beef chuck roast as directed, then add all prepped ingredients and seasonings. The Instant Pot will do the rest while you go about your day. I love waking up to the smell of this cooking.

Freezer-Friendly

This dish freezes beautifully for up to 3 months. Portion the cooked roast with sauce into freezer bags, squeeze out excess air, and label with the date. Thaw overnight in the fridge before reheating.

Reheating Tips

To reheat from frozen, transfer to the fridge for 24 hours to thaw. Then warm in the Instant Pot on sauté mode with a splash of beef broth for 10-15 minutes, stirring occasionally. 🔥

Sauce Adjustments

If the sauce thickens too much during storage, stir in ¼ cup beef broth while reheating. For extra richness, add a pat of unsalted butter at the end. The flavors deepen over time.

Meal Prep Shortcut

Cook a double batch on Sunday and portion into meal prep containers. Pair with mashed potatoes or rice for easy lunches all week. This dish tastes even better the next day.

Frequently Asked Questions