Mix thoroughly and save in a glass jar or zip-lock bag.
For the Sauce
Combine the first 10 ingredients in a large pot. Turn heat to medium and stir well to melt sugar and dissolve mustard.
Bring to a boil carefully (stirring often), reduce heat to medium low and allow mixture to simmer until onions are done stirring frequently, approximately 20 minutes.
Add the ketchup, Worcestershire and liquid smoke.
Stir mixture well and bring back to a simmer for approximately 45 minutes, stirring frequently. Let stand to cool, overnight is best.
Notes
Caution1. Always cook this recipe in a well-ventilated area. The smell can be overwhelming.2. Stirring is very important to prevent the sugar from scorching or burning.3.NEVER substitute another vinegar for apple cider vinegar.4. Don't spend a lot of money on ketchup, the cheaper the better.5. To add heat add 1-1 1/2 tablespoons of red pepper flakes.6. The sauce can be bottled for longer life but must be processed in a canner, which gives it an indefinite shelf life. However, when opened, the sauce must be refrigerated.