Prepare the Berries
Wash the black currants thoroughly and remove any stems. If using frozen berries, thaw slightly.Cook the Fruit
Add black currants and water to a saucepan. Cook on medium heat for 8–10 minutes until the berries soften and release juice.Mash the Mixture
Lightly mash the berries using a spoon or masher to create a pulp-like consistency.Add Sugar & Lemon Juice
Stir in sugar and lemon juice. Mix well until the sugar dissolves completely.Boil Until Thick
Increase heat and bring the mixture to a rolling boil. Cook for 10–12 minutes until it thickens. Stir continuously to avoid burning.Check Setting Point
Place a small drop on a cold plate. If it wrinkles when pushed, the jam is ready.Store the Jam
Pour the hot jam into sterilized jars. Seal tightly and let it cool at room temperature.