Add beef cubes to your slow cooker.

In a small bowl, mix melted butter, garlic, onion powder, Italian seasoning, salt, and pepper.

Pour the garlic butter mixture over the beef. Toss to coat evenly.

Cover and cook on low for 6–8 hours or high for 3–4 hours, until beef is fork-tender.

Garnish with parsley and serve with mashed potatoes, rice, or veggies.