Vintage jam recipe will take you back to the days at great grandmas house. Rose City mastered the art of preservation by lending natures best local berries and fruit. Use as a glaze on cheesecake, ice cream or mix with all of oil for a tasty vinaigrette. You could always go retro and try it on some toast.
Refrigerate after opening
Oregon Blackberries, sugar, vinegar, white grape juice, pectin.