Add the chili sauce, apple butter, maple syrup, molasses, ground cloves, and ground cinnamon to the slow cooker. Stir to combine.
Add frozen meatballs to the prepared sauce. Toss to coat.
Cover and cook on HIGH for 2.5-3 hours or LOW for 4-5 hours. Stirring occasionally so the meatballs won't burn on the edges. Serve as an appetizer or as an entrée over mashed potatoes or rice with roasted veggies.
Notes
Where can I find chili sauce?You can find chili sauce at the grocery store near the ketchup, and the brand is usually Heinz. Do not buy sriracha hot chili sauce or Thai sweet chili sauce.Where can I find apple butter?Apple butter is found in the grocery store near the jams and jellies.Other jams or sauces you can use:
PumpkinButter Meatballs - Use one cup of pumpkin butter in place of the apple butter.
Cranberry Meatballs - A can of jellied cranberry sauce is wonderful in this reicpe instead of the apple butter.
Red Current Jelly - Red current jelly has such a tart and wonderful flavor and is great in this recipe. Use one cup instead of the apple butter.
How to store: Store meatballs in an airtight container within the refrigerator for up to 3 days or in the freezer for up to 3 months.