01 -
Place the beef chuck roast into the slow cooker.
02 -
Add blackberries, minced garlic, sliced onion, balsamic vinegar, beef broth, brown sugar, soy sauce, dried thyme, salt, and black pepper to the slow cooker.
03 -
Cover and cook on LOW for 6–8 hours or on HIGH for 4–5 hours until the beef is very tender and easily pulls apart.
04 -
Remove the cooked beef and shred it using two forks.
05 -
If thicker sauce is desired, mix cornstarch with 2 tablespoons water to form a slurry, stir into the slow cooker, and cook for 10–15 minutes until the sauce thickens.
06 -
Return shredded beef to the slow cooker and mix thoroughly so it is fully coated with sauce.
07 -
Serve warm over mashed potatoes, rice, or toasted bread.