Your answer reminded me of what my folks made with blackberry. They called it Blackberry Cordial. It was to ease tummy trouble and stopped diarrhea!

Blackberry Cordial
1 quart of blackberry juice
1 lb. white sugar.
½ oz. grated nutmeg.
½ oz. powdered cinnamon.
¼ oz. allspice.
¼ oz. cloves.
1 pint best brandy. Or white Lightnin', if your Dad made that...

Tie the spices in thin muslin bags; boil juice, sugar, and spices together fifteen minutes, skimming well; add the brandy; set aside in a closely covered vessel to cool. When perfectly cold, strain out the spices, and bottle, sealing the corks.