Measure and add the ketchup, vinegar, worcestershire, sugar, mustard, paprika, salt and pepper into to a mixing bowl, preferably with a spout.
Whisk well until the sugar has dissolved and the spices are throughout.
Pour barbecue sauce into an air-tight jar(s) or container(s) and store it in your fridge. This allows the flavors to develop and meld. Overnight is best but at the least a few hours will do.
This sauce can also be frozen.
1/3 cup vingegar for a sweeter sauce and 1/2 cup for zippier, more vinegar style sauce. Packing the brown sugar is crucial so the vinegar is balanced, so if you feel the sauce is still too vinegary, add more dark brown sugar. If stored in an air-tight jar, this sauce will last for 2 weeks if not longer.