In a large bowl combine flour, onion powder, garlic powder, salt and pepper. Coat eat piece of beef lightly in flour mixture. In a large skillet, heat olive oil as needed over medium-high heat. Brown beef in batches, Remove to a paper towel lined plate. When all beef is browned, add to your slow cooker.

In a small bowl combine soup, onion soup mix, beef broth, Worcestershire sauce, beef stock, beef stock powder, water, alt and pepper to your liking. Mix well and pour over beef. Cook on Low setting for 6-8 hours until gravy has thickened a bit and the beef is cooked through. Serve over egg noodles, rice, or mashed potatoes. Garnish with parsley if desired and a vegetable on the side.