Creating Swedish Meatballs in a crockpot is simple. Follow these easy steps for a delicious meal:

1. Mix the Meatball Ingredients: In a large bowl, combine ground beef, ground pork, breadcrumbs, Parmesan cheese, parsley, egg, salt, pepper, onion powder, garlic powder, nutmeg, and allspice. Mix gently until combined.
2. Form the Meatballs: Shape the mixture into meatballs, about 1-inch in diameter. Place them on a baking sheet as you go.
3. Brown the Meatballs (Optional): In a skillet over medium heat, brown the meatballs on all sides for added flavor. This step is optional but recommended for a richer taste.
4. Transfer to Crockpot: Place the meatballs in the crockpot.
5. Add Broth: Pour the beef broth over the meatballs, ensuring they are mostly submerged.
6. Cook: Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours.
7. Prepare the Sauce: Once cooking is complete, carefully remove the meatballs and set them aside. In a bowl, mix sour cream and cornstarch to create a smooth sauce.
8. Combine: Stir the sour cream mixture into the broth in the crockpot, mixing well.
9. Return Meatballs: Place the meatballs back in the crockpot, stirring to coat them in the sauce.
10. Serve Warm: Allow the meatballs to warm through for about 15 minutes before serving.

These steps will help you create an incredible dish of Swedish Meatballs that your family and friends will love.