Add the meatballs and little smokies to the slow cooker.
Squeeze over the barbecue sauce and grape jelly.
Stir. Don't worry about mixing in the grape jelly completely, it will melt when it heats up.
Cook on LOW for 5 hours or HIGH for 3.5.
This may seem like a long cooking time, but these only improve with time. They will start absorbing the sauce later in the cooking time.
Video
Notes
Store any remaining meatballs and smokies in an airtight container. Keep them in the fridge for up to 4 days. Reheat them on the stovetop over medium heat.
For this appetizer recipe, you can always use beef meatballs, pork meatballs, turkey meatballs, chicken meatballs, or a combination.
When it comes to flavor, you can play around with adding Heinz chili sauce, pineapple chunks, and chopped onion.