Source: Aiken Pool Hall - Aiken, South Carolina (they are famous for having the best chili dogs in the area)

1 pound hamburger meat
4 medium onions, diced/chopped
4 tablespoons yellow mustard
3 teaspoons granulated sugar
2 teaspoons apple cider vinegar
2 teaspoons chili powder
1 cup catsup
Salt

Break up the hamburger meat and put into a 4-quart pan. Add enough hot water to make a thick mix. Stir until smooth. Add remaining ingredients. Cook slowly for 1 hour. Can be thinned as needed with water or beer.