In a medium sized sauce pan combine 2 ½ cups of the blackberries with all remaining ingredients except the water.
Using a hand held blender, blend all ingredients to desired consistency. Heat to medium heat, stirring occasionally.
Stir in the water and the remaining whole berries. Increase heat to a low boil, stirring constantly.
Reduce heat to a simmer and cook for 30 minutes or to desired thickness. Stir frequently to prevent sticking.
Remove from heat and cool. Pour into a clean quart jar and seal. Refrigerate.
Notes
If you do not have a hand held blender, place the noted ingredients into a standard blender or food processor before cooking.BBQ Sauce will thicken upon standing and refrigeration.