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Home » Gluten-Free Comfort

Easy No-Packet Whole30 Slow Cooker Mississippi Pot Roast

By Gary White
This post may contain affiliate links.
Read my full disclosure here.

Published August 6, 2022. Last modified August 12, 2025 By Gary White

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Mississippi pot roast served over rice on a white plate.

With just six whole-food ingredients (and no packets or butter!), this Whole30 slow cooker Mississippi pot roast is an easy dinner full of rich, tangy flavor. It's also surprisingly low-carb, keto, dairy-free, gluten-free, and Whole30 compliant!

Whole30 slow cooker Mississippi pot roast with onions and pepperoncinis.

Why This Recipe Works

  1. Skip the butter, it doesn't need it. Chuck roasts are full of fat already, and that fat will break down while cooking and make its own jus. The butter is unnecessary.
  2. This recipe couldn't be much easier. Anybody, regardless of cooking experience, can make this!
  3. You can easily customize the spice level by changing how many peppers you add and how much brine you use.
  4. Skip the gravy and ranch packets! Any flavor you think you will lose by leaving out the packets is taken care of by adding the brine. The acidity in the brine transforms the rich broth from boring to bright and lively! Not to mention, leaving the packets out leaves you with only whole-food ingredients! And the dish becomes gluten and dairy-free! Perfect for serving at a potluck or dinner with various dietary needs.
Mississippi pot roast served over rice on a white plate.

What You'll Need

Ingredients for Whole30 slow cooker Mississippi pot roast

How to Cook Whole30 Slow Cooker Mississippi Pot Roast

uncooked chuck roast in slow cooker topped with salt and pepper
Place chuck roast in slow cooker and season on top with kosher salt and black pepper.
chuck roast covered with sliced onions in slow cooker with a glass lid
Top roast with sliced onions. Place the lid on the slow cooker, and cook on high for 4 hours (or low for 6 hours).
Pot roast topped with pepperoncini peppers cooking in slow cooker with glass lid.
After 4 hours on high (or 6 hours on low), the natural juices will have been released from the roast. Slide the onions into the broth, top the roast with the pepperoncinis, and pour in the brine. Cover again and continue cooking for 2 more hours on high (or 3 hours on low).
Pot roast in slow cooker with peppers and onions being pulled apart with two forks.
Using two forks, pull apart the roast, creating bite-sized shreds.

And This is the Amazing Result

Mississippi pot roast served over rice with sweet potatoes on a white plate.

FAQs

Can I add butter? Absolutely. And if you do, it will taste very, very good. The point of this version is that it ALREADY tastes very, very good, even without the butter. 😉

Doesn't the brine from the peppers make this too spicy? The level of spice will vary based on how much brine you use. The amount of brine used in this recipe will give you a medium spice. If you're sensitive to spice, you can leave out the brine and just top the roast with peppers. The peppers should have just a little brine inside them, not enough to notice the spice.

What side dishes do you recommend serving this with? My favorite way to eat this roast is served in a bowl, over rice, and with lots of the jus. It also goes great over mashed potatoes and even better over mashed sweet potatoes. The sweetness pairs well with the mild spice.

What is brine? Brine is the liquid in the jar of pepperoncinis.

More Pot Roast Recipes

  • Crock Pot Pot Roast with Cream of Mushroom Soup
  • Pressure Cooker Pot Roast

★ Did you make this Whole30 Slow Cooker Mississippi Pot Roast? 

Please give it a star rating below! ★

📖 Recipe

Whole30 slow cooker Mississippi pot roast with onions and pepperoncinis.

Slow Cooker Mississippi Pot Roast (No Packets, No Butter)

This slow cooker Mississippi pot roast skips the packets and butter for a cleaner, richer take on the classic. Just six ingredients and a few hours in the Crock Pot for fall-apart beef in a peppery, tangy jus.
5 from 2 votes
Print Pin Rate
Course: Main Course
Cuisine: American
Prep Time: 5 minutes minutes
Cook Time: 6 hours hours
Servings: 8
Calories: 418kcal
Author: Gary White

Ingredients 

  • 4 lb. chuck roast
  • 2 tsp. kosher salt
  • 1 tsp. ground black pepper
  • 1 yellow onion thick sliced
  • 8 pepperoncini peppers whole or sliced, from jar
  • ⅔ cup pepperoncini brine from the same jar

Instructions

  • Season the roast with salt and pepper, then place it in a dry slow cooker.
  • Top with sliced onions. Cover and cook on high for 4 hours (or low for 6).
  • After 4 hours, slide onions into the juices, add pepperoncinis, and pour in the brine.
  • Cover again and cook 2-3 more hours on high (or 3-4 more on low), until it pulls apart easily with a fork.
  • Shred with two forks and serve with the jus.

Video

Notes

Notes & Tips

  • No packets, no butter. Just clean, simple ingredients with big flavor.
  • Spice control: The brine brings a mild heat. For less spice, skip it and use just the peppers.
  • Best sides: Serve it over mashed sweet potatoes, classic mash, or rice--whatever can soak up the gravy.
  • Leftovers: Store in the fridge for up to 4 days or freeze in portions with the jus.

FAQs

Can I add butter?
Sure. But you won’t need it. The flavor’s already there.
Is it spicy?
Just enough. Want it milder? Skip the brine.
What’s the best side dish?
Mashed sweet potatoes all day.
What is brine?
It’s the pickled liquid in the jar of pepperoncinis. Tangy and packed with flavor.

Nutrition

Calories: 418kcal | Carbohydrates: 2g | Protein: 44g | Fat: 26g | Saturated Fat: 11g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 13g | Trans Fat: 2g | Cholesterol: 156mg | Sodium: 663mg | Potassium: 807mg | Fiber: 1g | Sugar: 1g | Vitamin A: 67IU | Vitamin C: 9mg | Calcium: 46mg | Iron: 5mg
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Reader Interactions

Comments

  1. Tarelsha

    November 25, 2022 at 1:19 am

    5 stars
    This roast was soo delicious that we ate it all the first day….so I went to the store the next day and bought a whole new roast to cook it again! Lol! Keep the recipe’s coming!

    Reply
5 from 2 votes (1 rating without comment)

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Meet Gary

I'm Gary... husband, dad, recipe developer, and comfort food nerd. I believe in real food for real life. This blog? It’s where I share the recipes my family actually eats. Simple, soulful, and full of flavor. My goal is simple: help you cook food worth making again. More about me...

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