Place the blackberries and lemons in a nonreactive pot with the pectin and butter, and bring to a strong boil. Add half the sugar. When the mixture shows further signs of beginning a second boil ...

His first-ever submission, Green Lemon marmalade, received a Gold Award. 08:14 Out of thousands of entries, it was recognized as one of the competition's top 50 for its taste, aroma, and appearance.