- 1 (2 1/2 pound) boneless beef chuck roast
- 1/8 teaspoon salt
- 1/8 teaspoon ground black pepper
- 1/2 teaspoon garlic powder
- 1 large onion, halved and sliced
- 1/2 cup balsamic vinegar
- Season roast with salt, pepper, and garlic powder.
- Heat a skillet over medium-high heat. Cook roast in hot skillet until browned on all sides, 3 to 5 minutes per side.
- Place roast in a slow cooker and scatter onion slices around roast. Pour vinegar over the roast and onions.
- Cook roast in the slow cooker set to Low until tender and falling apart, 6 to 8 hours. Shred meat and return to slow cooker with juices.