Mulberry jam is a traditional seasonal preserve prepared in late spring and early summer, when mulberries are naturally sweet and deeply coloured. Unlike commercial versions that rely on added pectin, this recipe uses the fruit’s natural pectin, activated with lemon juice and controlled boiling. Preserving mulberries extends their short harvest window, allowing their earthy sweetness and subtle tartness to be enjoyed year-round. The balance of sugar and acidity ensures proper gel formation, safe storage, and a vibrant jewel-toned finish.