1️⃣ Sear the Beef (Optional but Recommended)
Season chuck roast generously with salt and pepper.Heat olive oil in a skillet and sear on all sides until browned (2–3 minutes per side).2️⃣ Make the Sauce
In a blender, combine all barbacoa sauce ingredients.Blend until smooth.3️⃣ Slow Cook
Place beef in the crock pot.Pour sauce over the meat. Cover and cook:LOW: 8–9 hoursHIGH: 4–5 hoursUntil beef is fork-tender.4️⃣ Shred & Serve
Remove beef and shred with two forks.Return shredded beef to the crock pot and stir into the sauce.Cook on LOW for 15–20 minutes more to soak up flavor.