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Mexican Barbacoa Instant Pot Rump Roast

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This Mexican Barbacoa Instant Pot Rump Roast is an easy shredded beef Instant Pot recipe that also happens to be paleo and gluten-free. And as usual, I’ve tried to simplify the recipe to include ingredients you already have at home. While traditional barbacoa calls for chipotle chilis in adobo, we make do with a few substitutions! Ready in 1 hour and delicious served over tacos or rice (or perhaps a lettuce taco bowl for full paleo). If you don’t have an Instant Pot or prefer to use a slow cooker, no worries! There’s a slow cooker option for you! 

Click here to skip ahead to the instant pot rump roast barbacoa recipe

Mexican Barbacoa Instant Pot Rump Roast Shredded Beef Instant Pot Recipe

Just before I went back to college last fall, my parents gave me a shiny new Instant Pot. We’d been hearing about these strange modern devices for a while and figured it was time to give it a go.

I admit I wasn’t too sure about the Instant Pot at first. So I’d stand by the stove in my apartment, happily stirring my stove top soups while my roommates cooked in the appliance (sorry, Mom and Dad). But when said roommates started waxing poetic about the wonders of said Instant Pot, I gave in and tried it.

Shredded Mexican Barbacoa rump roast tacos.

Turns out the Instant Pot can make all sorts of things: I’ve made soups in it, roasts, shredded chicken, and even tried a risotto. I’ve seen food bloggers on Pinterest make cheesecakes in the instant pot, but most food bloggers are a little crazy and I’m not ready to trust them on that level.

Mexican Barbacoa shredded beef rump roast in the Instant Pot.

The verdict on Instant Pots: Yes, they work! An Instant Pot can indeed make a tender roast in under an hour. If you’re not big on planning ahead, Instant Pots can be a real life saver. That said, the Instant Pot does not offer an exception to the rule that the best things in life take time. An Instant Pot rump roast will not have the same flavor as one that has slow roasted for hours in juices and flavors. An Instant Pot risotto is nothing like the creamy goodness you’ll get from the stove-top. An Instant Pot also creates a lot of extra water during cooking because of all the steam, and I’ve found that often that water leeches flavor out of the meat.

Mexican Barbacoa rump roast shredded over tacos with cilantro garnish.

Hence, the challenge was to create a shredded beef Instant Pot recipe that didn’t lose all its flavor but did cook in 1/10 of the time. I think I’ve managed it with this shredded beef Instant Pot rump roast. While this recipe will still not be as flavorful as traditional slow-roasted barbacoa, it comes darn close. And for those of you who are willing to wait it out, there’s a slow cooker option here as well.

Mexican Barbacoa Instant Pot Rump Roast

Linnaea
This Mexican Barbacoa Instant Pot Rump Roast is an easy shredded beef instant pot recipe that also happens to be paleo and gluten-free. And as usual, I’ve tried to simplify the recipe to include ingredients you already have at home. While traditional barbacoa calls for chipotle chilis in adobo, we make do with a few substitutions! Ready in 1 hour and delicious served over tacos or rice (or perhaps a lettuce taco bowl for full paleo). If you don’t have an instant pot or prefer to use a slow cooker, no worries! There’s a slow cooker option for you! 
Print Recipe Pin Recipe
Prep Time 15 mins
Cook Time 1 hr
Total Time 1 hr 15 mins
Servings 6 Servings

Ingredients
  

  • 2-3 lbs rump roast or chuck roast
  • 1 tablespoon salt coarse
  • 2 teaspoons black pepper coarse
  • 1 tablespoon cumin
  • 1 teaspoon smoked paprika
  • 1 teaspoon chili powder 
  • 1/2 teaspoon red chili flakes
  • 1 tablespoon olive oil
  • 1 large onion peeled and diced
  • 1 red bell pepper cut into  1/2 inch chunks
  • 1 small hot pepper of your choice jalapeno, chili, etc. Optional–this will make for spicy barbacoa, diced
  • Half of a medium-sized tomato I used other half to make guacamole later, cut into 1/4 inch chunks
  • 3 cloves garlic minced
  • half a bunch cilantro chopped
  • juice of 1 lime

Instructions
 

  • Thaw your roast out until almost thawed. You can thaw it completely, but I like to have it still a little frozen because it’s easier to cut. Then use a big knife to cut into four large chunks (you may also have to remove some twine, depending on the roast). 
  • Combine all the seasonings (salt thru chili flakes) in a small bowl, then rub thoroughly over your four roast chunks. 
  • Add the olive oil to the bottom of your instant pot or to a cast iron skillet on medium-high heat. Saute the four seasoned chunks of roast until medium brown on all sides. I fried mine two at a time rather than all four at once because the instant pot is too small for all four. 
  • Once the meat is browned, remove from the pan. Add a bit more olive oil if needed, then add the onions. Saute for a minute until they start to caramelize, then add the pepper and jalapeno. Saute for another 1-2 minutes until lightly brown. 
  • At this point, if you’re using the instant pot to saute, turn off heat. If you’re using a cast iron pan, transfer all onion mixture to instant pot, then swish about 2 tablespoons of water in cast iron pan to pick up flavors from pan and pour water into instant pot. If you want to use a slow cooker or roaster, add onion mixture to slow cooker/roaster and pour the water in as well.
  • Add the tomatoes, garlic, cilantro, and the beef roast chunks to the instant pot, slow cooker, or roaster. 
  • Instructions for Instant Pot:
  • At this point, just put the lid on the instant pot and turn it to the manual setting. Don’t add any more liquid. Set the time to 1 hour, and set the valve to “sealing.” And that’s it! Just let it go for an hour until it beeps. At that point, make sure it’s off and then set the valve to “venting.” And when you move to venting, make sure your face is away from the instant pot. The “venting” valve will release a lot of very hot steam. 
  • Step away while it’s venting, then when it stops (you’ll hear it stop making noise), carefully open the lid. Again, don’t let the steam get in your face, though it won’t be as pressurized by now.
  • There will be quite a lot of liquid (sadly inevitable when dealing with the instant pot). Remove your four big roast chunks and place them on a cutting board, then use forks to shred. Return to juices and stir around to allow juices to coat the meat. Then spoon the mixture into a serving dish or plastic container (if you’re saving to reheat later). As you’re spooning, pick up the meat, tomatoes, and peppers but leave about half of the liquid behind. You can use this leftover liquid in a soup or simply discard. 
  • And that’s it! Serve on tacos, over rice, or in a taco bowl.
  • Instructions for Slow Cooker or Roaster: Once you have all your ingredients in the slow cooker or roaster, add about 1/4 inch of water to the bottom. Place lid on and turn to medium heat on the slow cooker or to around 200 degrees F on the roaster. Slow cook/roast for around 6 hours until meat is tender (checking water level occasionally to maintain at 1/4 inch).
  • Remove, shred, and serve or transfer to container.
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Category: Beef Chuck Roast Recipes, Beef Rump Roast Recipes

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Reader Interactions

Comments

  1. Todd

    April 5, 2020 at 10:40 pm

    5 stars
    This was perfect! We live a keto lifestyle; this was delicious with some homemade keto tortillas. The flavor was just right, the beef roast from Alderspring was so flavorful. We let the rub sit on the four slices of roast for about six hours before browning the meat, it really seemed to flavor the meat through and through. We cooked everything in the Instant Pot for the hour and the meat just fell apart when finished. Very good! Thank you for the great recipe idea!

    Reply
  2. TAMMY KING

    January 18, 2021 at 6:43 pm

    5 stars
    Tried and True perfect every time better then Chipotles.

    Reply
    • Linnaea

      January 19, 2021 at 4:22 am

      Thanks so much, Tammy! Glad you enjoyed!

      Reply

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Linnaea at AlderspringHi, I'm Linnaea: ranch girl and lover of good food made with real ingredients. My family raises grass fed, certified organic beef. I blog all about cooking it.

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