For the Meatballs

• ⅓ cup breadcrumbs
• ½ cup milk
• 2 tablespoons heavy cream
• 1 large egg
• ½ teaspoon kosher salt
• ¼ teaspoon ground black pepper
• ¼ teaspoon ground allspice
• ¼ teaspoon ground nutmeg
• 1 tablespoon minced fresh parsley
• 1 tablespoon unsalted butter (⅛ stick)
• 1 tablespoon vegetable oil
• ½ yellow onion minced
• 1 clove garlic minced
• 1 pound ground chicken
• 1½ pounds ground chuck

For the Sauce

• 6 tablespoons unsalted butter (¾ stick)
• ⅓ cup all-purpose flour
• 14.5 ounces low sodium beef broth
• 14.5 ounces low-sodium chicken broth
• 1 cup heavy cream
• ¾ cup sour cream
• 1 teaspoon Beef Instant Bouillon Granules
• 1 tablespoon low-sodium soy sauce
• 1 teaspoon Dijon mustard
• 1 teaspoon Worcestershire sauce
• 1 teaspoon apple cider vinegar
• 1 tablespoon granulated sugar
• ½ teaspoon freshly ground black pepper
• Kosher salt as needed
• 1–2 tablespoons minced fresh parsley

For Serving (Optional)

• Cranberry sauce or lingonberry jam