01 -
Place frozen meatballs directly into the crockpot; no thawing necessary.
02 -
In a bowl, whisk together cream of mushroom soup, beef broth, soy sauce, Worcestershire sauce, Dijon mustard, garlic powder, onion powder, and black pepper until smooth.
03 -
Cover the meatballs evenly with the sauce mixture, stirring gently to coat all meatballs.
04 -
Cover the crockpot and cook on LOW for 4 to 5 hours or HIGH for 2 to 3 hours without lifting the lid during cooking.
05 -
About 30 minutes before serving, gently stir the sour cream into the crockpot to enrich the sauce.
06 -
If desired, blend cornstarch with water and stir into the crockpot; cook for an additional 15 to 20 minutes to thicken the sauce.
07 -
Spoon the creamy meatballs and sauce over egg noodles, mashed potatoes, or rice and garnish with parsley if preferred.