Start by cutting the beef chuck roast into 1-inch cubes and placing them in a large mixing bowl.
In a separate bowl, melt the unsalted butter in the microwave or stovetop.
Once the butter is melted, add the minced garlic, soy sauce, Worcestershire sauce, dried thyme, black pepper, and salt. Mix well to combine.
Pour the garlic butter mixture over the cubed beef in the mixing bowl, ensuring all pieces are well-coated.
Transfer the beef and garlic butter mixture into the slow cooker.
Cover the slow cooker and cook on low for 6 hours or until the beef is tender and cooked through.
Once cooked, give it a gentle stir and garnish with chopped fresh parsley before serving.
For a more intense flavor, let the beef marinate in the garlic butter mixture for 30 minutes before cooking.
Serve the beef bites over rice, mashed potatoes, or pasta to soak up the delicious sauce.
Store leftovers in an airtight container in the refrigerator for up to 3 days.