Slow Cooker Barbacoa Beef for Easy Weeknight Tacos Step-by-step instructions

Before you start

Before you begin, ensure your slow cooker is clean and placed on a flat, stable surface. Take the beef roast out of the refrigerator about 20 minutes before cooking so it is not ice-cold when it hits the cooker.

Have your measuring cups ready for the lime juice and ensure your taco seasoning packet is opened and ready to go. Clear a space on your counter for the shredding process later, and make sure your shredding forks are clean and ready to handle the hot, tender meat once it is finished cooking.

Instructions

Preparation and Assembly

1. 1Assemble the Ingredients
   Place the beef chuck roast into the bottom of the slow cooker. Evenly distribute the diced onion over the top of the roast. Sprinkle the entire packet of taco seasoning over the onion and beef, ensuring it covers the surface well.
   Look for The beef should be sitting flat at the bottom of the cooker.
   Tip Ensure the slow cooker is on a stable, heat-resistant surface away from water sources.

At the end of this phase, the beef should be nestled in the bottom of the slow cooker with the diced onions and taco seasoning distributed evenly over it. The kitchen should smell like the dry spices. Check that the beef is laying flat and not bunched up to ensure even heat distribution. Ensure the slow cooker power cord is safely plugged in and the settings are correctly adjusted to the low heat position before you secure the lid.

Slow Cooking

2. 2Add Liquid and Cook
   Pour the lime juice evenly over the beef and seasonings. Cover the slow cooker with the lid and set to low. Cook for 8 hours until the meat is extremely tender, reaches an internal temperature of at least 145°F (63°C), and pulls apart easily with a fork. Let the meat rest for at least 3 minutes before shredding.
   Look for The beef is done when it reaches an internal temperature of at least 145°F (63°C).
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Avoid lifting the lid frequently to maintain a consistent temperature inside the slow cooker.

During this long cooking phase, the slow cooker should maintain a steady, low simmer. You might hear faint bubbling or see steam escaping from the lid. The kitchen will begin to smell savory and aromatic as the beef cooks. Do not lift the lid during this time. At the end of the 8 hours, the beef should look significantly smaller and darker, with visible juices at the bottom of the cooker, indicating that the collagen has successfully broken down.

Resting and Shredding

3. 3Shred and Serve
   Remove the beef from the slow cooker and transfer it to a large platter or cutting board. Use two forks to shred the beef into bite-sized pieces before serving.
   Look for The meat should shred effortlessly with minimal pressure from the forks.
   Tip If the beef is too dry, spoon some of the cooking liquid from the slow cooker back over the shredded meat.

Once removed from the cooker, the beef should appear dark, tender, and moist. After the 10-minute rest, use your forks to shred the meat. It should pull apart with almost no resistance, creating long, succulent strands.

The meat should look juicy and be coated in a light, flavorful glaze. If the meat appears to have excess fat, you can skim it off from the surface of the cooking liquid before serving, ensuring the final dish is perfectly balanced.

Common mistakes

A common mistake is using a cut of meat that is too lean, which results in dry, tough shreds regardless of how long it cooks. Another frequent error is opening the slow cooker lid too often, which releases precious heat and steam, significantly increasing the cooking time and potentially drying out the edges of the meat.

Additionally, ensure you do not add too much liquid; the beef will release its own juices, and the lime juice is sufficient for the braising process without making the final result watery or dilute.

How to tell it’s done

The barbacoa is done when the beef reaches an internal temperature of at least 145°F (63°C). Beyond the temperature, visual and physical cues are key: the meat should be extremely tender and yield easily to the pressure of a fork.

If you pull on the meat and it still feels firm or resistant, it needs more time. The final texture should be moist, juicy, and falling apart in long, delicate strands. Remember to let the roast rest for at least 10 minutes before shredding to lock in the moisture.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest