Slow Cooker 3-Ingredient Rump Roast–an easy beginner recipe for the slow cooker. Beef pot roast is cooked until tender in your crockpot. If desired you can also make carrots and potatoes with the roast.
Get the Instant Pot 3-Ingredient Rump Roast recipe here
Slow Cooker 3-Ingredient Rump Roast
This recipe was sent to me by a reader named Kathy. It’s a super easy recipe that you don’t have to spend much time putting together…dump and go!
The rump roast does, however, take a while to get tender. Give yourself a good 10-12 hours . It takes a tough piece of meat and makes it fork tender. It doesn’t fall apart but it is easily shreddable or sliceable.
The potatoes and carrots are an optional step. You add them in later and let them cook for only 4 hours. If you tried to add them at the beginning they would be mushy.
The broth and drippings make an easy gravy. All you have to do is stir in a cornstarch slurry and let it thicken up. The roast rump doesn’t have much fat on it so there is not a lot of grease.
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What Slow Cooker Did You Use?
For this recipe I used my 6 quart oval Kitchenaid slow cooker.* I love this slow cooker. It cooks low and evenly. I love the medium heat choice because most slow cookers that I’ve seen only have the option of cooking on low or high. If you’re going to buy just one slow cooker, this is the one that I recommend.
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Slow Cooker 3-Ingredient Rump Roast
- Prep Time: 10 minutes
- Cook Time: 10-12 hours
- Total Time: 38 minute
- Yield: 4-6 servings 1x
Description
An easy beginner recipe for the slow cooker. Beef pot roast is cooked until tender in your crockpot. If desired you can also make carrots and potatoes with the roast.
Ingredients
- 2–3 pounds rump roast, trimmed of excess fat
- 2 cups water
- 1 packet onion soup mix
- 1 (1 oz) au jus gravy mix packet
- Optional: 1 pound baby carrots
- Optional: 1 pound Russet potatoes, peeled and cut into chunks (or yellow potatoes, skin on)
- Cornstarch
Instructions
- Add roast and water to the slow cooker. Sprinkle in the au jus and onion soup mix packets.
- Cover and cook on low. If you want to add the potatoes and carrots let the roast cook for 6 hours and then add the vegetables in for the last 4 hours. If you don’t want potatoes and carrots then just cook on low for 10-12 hours, or until roast is tender.
- Remove the lid and place roast and vegetables on a platter.
- To make gravy: Turn slow cooker to high. Make a cornstarch slurry in a small bowl. Stir together 2 Tbsp of cornstarch and 2 Tbsp of cold water until smooth. Stir the slurry into the pot. Whisk. It should thicken the gravy in a few minutes.
- Serve the gravy with the roast and optional vegetables.
Notes
I used my 6 quart oval Kitchenaid slow cooker.*
To make gluten free: Most onion soup mixes are not gluten free. Kroger brand, however, does not contain gluten although it is not labeled as gluten free. Try this homemade recipe and keep it on hand: 1-1/2 cups dried minced onion, 1/4 cup GF beef bouillon powder, 2-1/2 TBS onion powder, 1/2 tsp crushed celery seed, 1/2 teaspoon sugar. 5 Tablespoons of this is about equal to a packet.
- Category: Beef
- Method: Slow Cooker
- Cuisine: American
Nutrition
- Serving Size: 1/5 of 2 1/2 pounds rump roast plus serving of gravy
- Calories: 364
- Sugar: 1 g
- Sodium: 1370 mg
- Fat: 12 g
- Carbohydrates: 9 g
- Protein: 50 g
Keywords: pot roast
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Hey guys, I just wanted to say I make this recipe with those pre-made sauces like Campbell’s slow cooker sauces or Red Fork. They are wet sauces that say don’t add water but just meat. I mix them with a dry packet of onion mix, but use maybe a cup or half of water. The flavors are just fantastic!
★★★★★
Good to know! Thanks!
Made this yesterday with a really nice roast (5#) from Fresh Market. I split the roast into 2 pieces and put into two crock pots – 1 traditional, 1 was my Ninja air fryer that also is a crock pot. Cooked on low for a full 12 hrs with the seasoning, and added the potatoes, carrots and onions with 4 hours to go. Everyone loved it! The roast was so tender it literally fell apart and was SO tender. I’ve slow cooked before, but not for this length of time and will definitely use again! I did not sear the meat first.
★★★★★
Good to hear it! Glad it worked out well.
Hi Karen, or anyone,
Thank you for sharing this recipe. Rump roast is on sale, so I was looking for a (6.5 quart) slow-cooker recipe.
I am happy to see that you used your 6 quart slow cooker! At first I thought that with just a 2-3 pound roast that that would not be large enough, but I bet that it is fine because you added all of the vegetables?
Thank you, Maria
Yes should work great!
Thank you 😊
LOng story short it was delish simple and I would not hesitate to do this again with any type of rump bottom
or chuck. Added peas to the end of cooking. NO LEFTOVERS BOO HO)O
Haha! maybe make more next time so you’ll have leftovers??
I only have red potatoes, so have you tried it with them before?
I haven’t tried with red potatoes but I think it would be fine.
Has the best through V5 ever ate my whole life
I am currently making this in my crockpot. House smells delicious! Can not wait for it to be done. Amazingly simple and no fail.
★★★★
Thanks Amy! I’m glad you liked it 🙂
Do you have to sear it?
Tastes better that way but you don’t HAVE to. 🙂
This was absolutely delicious, I’m thinking of trying the same recipe with short ribs. What do you think?
Yum I bet that would be great!
I have a 3lbs roast and would love for it to be done latest 6 hours. Is that possible
Slice it in quarters and cook on high for 6 hours. That’s what I would do!
I want to make this recipe. I’ve never made a rump in crock pot. I have a 4 lb rump. I want it tender enough to slice but not fall away like stew.. how long, low? High. And searing it prior.. please help? Any one have any suggestions? Thank you
June
All crockpots cook differently so it’s hard to say for sure but I would do 8 hours on low and 6 on high.
i have a question. Does the rump roast fall apart are can you still slice it if you could get for 8 to 10 hours on low? My husband prefers it tender but still slice obal not falling apart.
It seemed to still be able to be cut. Not falling apart.
My crock pot only has high and low. I am putting a 5 lb rump roast on is it ok to put it on high? And how long should I cook it to be tender ?
Thank you
Yes you can use high. I would cook for 5-6 hours on high.
Just wanted to add you forgot to sear in a pan first to get the good flavours out.
The rump roast was delicious. It was really tender
★★★★★
Cooked the R. Roast in croc pot. Absolutely delicious. Carr is potatoes and onions.with tomato sauce too..