Wash blackberries and strain.
In a large Sautee pan add the blackberries and mash a bit with a wooden spoon or masher.
Add in the bourbon, vanilla, lemon juice, lemon zest, and sugar and stir. Let sit for 10 minutes.
Cook the blackberry mixture over medium high heat until it begins to boil.
Reduced heat to low and let simmer for about 25 minutes until desired thickness.
If using within a few days let cool and refrigerate.
If wanting to process to preserve for later, ladle hot mixture into hot sterilized jars and process. (see instructions in post).
