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Mom’s Best Pot Roast recipe uses an oven bag to cook a chuck roast in the oven with potatoes and carrots until fork tender, juicy and delicious! This easy one pot meal is a family favorite!

beef pot roast in oven bag with potatoes, carrots and celery.

This is my mom’s super easy recipe for pot roast in an oven bag. We had this roast beef dinner all the time when I was growing up, and it was always tender, flavorful and perfectly cooked!

Yes, I’m totally biased, but I just think this pot roast with potatoes and carrots is the best pot roast in a bag recipe ever. It’s also a one pan meal with easy clean-up, so it’s perfect for Sunday dinner or busy weeknights!

The secret to fork-tender beef pot roast in the oven is an oven bag. No need for a special roasting pan or Dutch oven. You should be able to find oven bags in just about any grocery store — usually with the food storage bags and disposable bakeware. You’ll want to read the manufacturer’s instructions before using.

beef chuck roast, Lipton onion soup mix, Reynolds oven bags, beef broth, potatoes, onion, flour, celery, carrots.


There are just a few simple ingredients in this pot roast in bag recipe. You can find them in your grocery store. Full amounts are in the printable recipe card below.

  • Boneless Beef Chuck roast
  • Flour — to thicken the juices
  • Lipton Onion Soup Mix — or any dry onion soup mix
  • Onion — yellow or white onion
  • Garlic cloves
  • Potatoes — Use Yukon gold potatoes or baby yellow potatoes or russet potatoes
  • Carrots — Whole carrots or baby carrots work
  • Celery — adds flavor
  • Beef broth — or water to make gravy

Best Meat for Pot Roast

My mom and grandma always used beef chuck roast, and that’s the cut of meat I’ve always used, as well. You can shred it with a fork, and it just melts in your mouth. You can also try using rump roast, but it really doesn’t shred like chuck. If you want to slice your roast, go with the rump roast.

How To Cook Chuck Roast in an Oven Bag

So first, place the roasting bag in a 13×9-inch baking dish. Add some flour to the bag, and shake bag so that flour gets evenly distributed. Then, add your chuck roast and sprinkle dry soup mix on top of the roast.

chuck roast with onion soup mix, garlic and potatoes in oven bag.

I like to add whole garlic cloves to the top of the roast and mash them into the roast after it’s cooked. Oh, talk about flavor!

Add the garlic gloves and place potatoes, carrots, onions and celery around and on top of the roast.

chuck roast in an oven bag with baby carrots, celery, potatoes and onions

Pour in a little beef broth or water, and close the bag with a nylon tie that comes with the oven bags. Next, use a sharp knife to poke small slits in the top of the bag for the steam to escape.

How Long to Cook Chuck Roast in Oven at 325

I cooked the chuck roast in the oven at 325 degrees F, and it was done in about 2 hours and 30 minutes. You can test the temperature by inserting a meat thermometer in one of the slits you made for venting. The temperature should be at or above 200 degrees F.

beef pot roast and vegetables baked in an oven bag

When done, the roast should shred easily with a fork. Don’t forget to mash the roasted garlic into the meat for even more flavor. And, be sure to pour those awesome juices over everything before serving!

kitchen tongs holding baked chuck roast.

How to Store Leftovers

Store leftover pot roast in an airtight container in your refrigerator for 3-4 days. For longer storage, you can freeze the roast in a freezer-safe container or storage bag for up to 3 months.

oven baked beef chuck roast on a platter with carrots, potatoes and celery

More of the Best Pot Roast Recipes

If you love this easy chuck roast recipe, try my Slow Cooker Pot Roast. You can also make an Instant Pot Pot Roast or this easy Crock Pot Mississippi Roast. Browse even more easy beef recipes to make for your family.

5 from 19 votes

Mom’s Best Pot Roast Recipe in Oven Bag

By: Dee
Mom's Best Pot Roast recipe uses an oven bag to cook a chuck roast in the oven with potatoes and carrots until fork tender, juicy and delicious! This easy one pot meal is a family favorite!until it's tender, juicy and delicious! Simple homestyle comfort food!
Prep Time: 15 minutes
Cook Time: 2 hours 30 minutes
Total Time: 2 hours 45 minutes
Servings: 10


  • oven bag


  • 1 tablespoon all purpose flour
  • 3 pound boneless chuck roast
  • 1 packet onion soup mix
  • 3 garlic cloves whole, peeled
  • 4 Yukon gold potatoes quartered
  • 4 large carrots peeled and cut into 2-inch pieces
  • 2 celery stalks cut into thirds
  • 1 medium onion peeled and cut into large chunks
  • 1 cup beef broth
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  • Preheat oven to 325℉
  • Place flour in oven bag, shake flour to evenly distribute
  • Place bag in 13×9 baking dish
  • Place chuck roast in bag
  • Sprinkle onion soup mix on top of roast
  • Place garlic cloves on the roast
  • Place potatoes in bag, and add carrots, onion and celery
  • Pour the beef broth in the bag, and use the ties to close bag
  • Using a sharp knife, cut 6 small slits or small holes on top of bag to allow steam to escape
  • Place roast in oven, and cook for 2½ to 3 hours or until roast and vegetables are tender, and internal temperature of roast is around 200℉ according to a meat thermometer
  • Remove from oven, and carefully open bag. Shred meat, and arrange meat and vegetables on a platter or serve directly from the bag


To make without oven bag, add all ingredients to a baking dish, cover, and bake, basting occasionally.
You can sub baby carrots for whole carrots and beef gravy mix for the soup mix.


Calories: 320kcal, Carbohydrates: 17g, Protein: 28g, Fat: 16g, Saturated Fat: 7g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 8g, Trans Fat: 1g, Cholesterol: 94mg, Sodium: 233mg, Potassium: 866mg, Fiber: 3g, Sugar: 2g, Vitamin A: 4834IU, Vitamin C: 16mg, Calcium: 47mg, Iron: 4mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Course: Main
Cuisine: American
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Recipe first posted in 2019 and updated in 2024.

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Recipe Rating


  1. Diane coomes says:

    Love this.5 stars

  2. Dawn says:

    Loved the recipe and no real clean up! Boy does this help for dinner! Kids loved it too!5 stars

  3. Stephanie says:

    This pot roast was fantastic! The meat was super tender and juicy and the flavor was amazing!5 stars

    1. Dee says:

      Thank you so much, Stephanie! Super glad you liked it!

  4. Allyson says:

    This is so perfect for fall dinner!!!

  5. James says:

    Had to make this yesterday. A blast from the past even the kids loved the flavor. Will be making this comfort often this winter.5 stars

    1. Dee says:

      I am SO happy that everyone loved the recipe, James! Thanks a bunch!

  6. jade manning says:

    This is the perfect dinner!5 stars

  7. Erin | Dinners,Dishes and Dessert says:

    Looks like a perfect weeknight dinner! Yum!5 stars

  8. Lora says:

    SO easy to make and perfect for fall. Can’t go wrong with mom’s recipe!!!5 stars

    1. Dee says:

      Exactly, Lora. Mom’s recipes are the best!

  9. Sara Welch says:

    I know what I will be having for dinner tonight! This looks amazing and packed with flavor!5 stars

    1. Dee says:

      Thanks, Sara! My family just loved it!