Combine in a non-reactive saucepan with a glass lid : 2 cups Heinz or Hunts Ketchup, 1/4-1/2 cup yellow mustard, 1/4 cup apple cider vinegar, 1/2 cup firmly packed brown sugar, 3 tablespoons Worcestershire sauce, 2 tablespoon chili powder, 1 tablespoon black pepper, 1 tablespoon onion powder, 1 tablespoon garlic powder, 2 teaspoon celery salt, 2 teaspoons liquid smoke, 1/4 to 1/2 teaspoon of cayenne pepper
Place over medium-high heat, stirring aggressively until starting to boil being careful to avoid splatter. This stuff is thick and will burn you.
Reduce heat to low and cover with a glass lid so you can see the action
Occasionally remove from heat and stir well. Please be sure to remove from heat before stirring to prevent splattering and burns.
Simmer for about 30 minutes.
The use ketchup you love. I like Heinz or Hunts only.
Adjust the mustard to your taste. A full 1/2 cup will give a heavy mustard taste. I usually use 3/8 cup.
The heat (spiciness) here is about 3/10 with 1/4 teaspoon of cayenne pepper. Adjust to your taste.
Good in the refrigerator for 5-7 days. Probably a lot longer but not tested.
Spoon some into small baggies and freeze for 3-4 months.
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