I make three different sauces, ketchup molasses based, apple cider vinegar hot pepper based and the mustard onion one bellow. The mustard one has become my favorite.
Mustard Vinegar Sauce
( I use about a cup of onion instead of a quarter cup. I use a blender to combine everything until smooth.)
1 cup apple cider vinegar
1/2 cup Yellow mustard
1/4 cup onion finely minced
2 cloves garlic pureed
1/2 teaspoon black pepper
1 tablespoon Worcestershire sauce
1/2 cup brown sugar
1/4 teaspoon cayenne pepper
1/2 teaspoon salt
1/2 teaspoon Tabasco sauce
Combine ingredients and simmer for 15 minutes, stirring occasionally.
For a smoother sauce, blend on high for a few minutes.
--------------------------------------------------------------------
Ketchup based
( I never use liquid smoke and sometimes use V8 instead of tomato juice)
http://allrecipes.com/Recipe/Kathys-Award-Winning-Barbeque-Sauce/Detail.aspx
Ingredients
1 cup ketchup
1 tablespoon Worcestershire sauce
1 cup molasses
2 tablespoons brown sugar
1/4 cup chopped onion
1 tablespoon garlic powder
1 teaspoon ground black pepper
1 teaspoon cayenne pepper
2 tablespoons lemon juice
1 (5.5 ounce) can tomato juice
2 tablespoons liquid smoke flavoring
Directions
In a blender or food processor, combine the ketchup, Worcestershire
sauce, molasses, brown sugar, onion, garlic powder, ground black
pepper, cayenne pepper, lemon juice, tomato juice, and liquid smoke
flavoring.
Puree until smooth, and transfer to a saucepan.
Place saucepan on the stove over medium heat.
Bring mixture to a boil, reduce heat to low, and simmer for about 1
hour, or to desired thickness.