Start by gathering all the ingredients you will need.
In a saucepan over medium-high heat, mix together the grape jelly, chili sauce, and cayenne pepper. Cook this mixture until it is warmed through, which should take about 5 to 10 minutes.
Next, place the frozen meatballs into a slow cooker and pour the warm grape jelly mixture over them.
Set the slow cooker to Low and let it cook for 3 to 4 hours.
Once done, serve the meatballs warm and enjoy!
