St. Louis Barbecue Sauce - cooking recipe

Ingredients

2 cups ketchup
1/2 cup water
1/2 cup apple cider vinegar
1/4 cup brown sugar
3 tablespoons yellow mustard
1 tablespoon instant minced onion
1 tablespoon granulated garlic
1 teaspoon cayenne

Preparation

In a medium size saucepan, combine all the ingredients, adjust heat to low and let simmer for 20 minutes, stirring frequently.
Remove from heat and cool. Store in refrigerator tightly covered. The sauce is better if allowed to sit 24 hours before using.