In a large skillet over medium heat, combine the jellied cranberry sauce, chili sauce, brown sugar, garlic powder, and black pepper. Stir the mixture continuously until it becomes smooth and glossy, which should take about 5 minutes.

Once your sauce is velvety, add the frozen pre-cooked meatballs to the skillet, making sure they’re evenly coated. Reduce the heat to medium-low, cover the skillet, and simmer for 15–20 minutes.

After simmering, transfer the Christmas Cranberry Meatballs to a festive serving bowl or a slow cooker to keep warm. Garnish with chopped fresh parsley or rosemary before serving.