Peel and cut the potatoes into bite-sized pieces. Cut the beef into similar-sized chunks. Chop the onion finely.
Put the potatoes, beef, onion, garlic powder, onion powder, salt, and pepper into the Crockpot.
Mix ranch dressing, sour cream, and heavy cream in a small bowl until smooth.
Pour the sauce over the ingredients in the Crockpot. Stir gently to coat the beef and potatoes.
Cover the Crockpot and cook on low for 6 to 7 hours, until the potatoes are soft and the beef is cooked.
Sprinkle shredded cheddar on top about 15 minutes before serving. Cover and cook until the cheese melts.
Top with fresh chopped parsley before serving for a fresh touch.