Before You Begin
Prepare your slow cooker and ingredients as needed. Cooking times and results may vary depending on your equipment and ingredients.
Add the grape jelly and BBQ sauce to the slow cooker. Stir until mostly combined. Small pieces of jelly will dissolve as the sauce warms.
Add the frozen, fully cooked meatballs to the slow cooker. Stir gently until the meatballs are evenly coated with the sauce.
Cover and cook on LOW for about 3–4 hours or HIGH for about 1–2 hours, stirring once or twice during cooking to keep the sauce evenly mixed.
The meatballs are ready when they are heated evenly throughout with no cold centers and the sauce appears smooth and glossy.
Stir gently before serving. If serving for a gathering, keep the slow cooker on LOW to hold warm and stir occasionally.