Place in a pot with preserving sugar, orange zest, and lemon juice.
Cover and let sit overnight in a cool place.
Then bring to a boil, stirring constantly, and let boil briskly for 5–7 minutes.
Remove from heat and pass through a fine sieve.
Fill hot rinsed canning jars with the hot marmalade, close tightly, and put in a cool place
Notes / Tips / Wine Advice:
Blackberries against Sugar
The fruit of the blackberry bush (Rubus fruticosus), which belongs to the rose family, can be found in both wild and cultivated variations. There are styptic, anti-inflammatory, and antidiabetic properties attributed to the blackberry. One of the youngest varieties is the thornlessly cultivated “Thornfree.” The Choctaw, Navajo, and Loch Ness varieties are also particularly delicious