If necessary, carefully wash, drain and sort the berries. Strip the currants from the panicles. Mix berries with jam sugar, citric acid and almonds in a large saucepan.
Bring everything to the boil while stirring constantly at high heat. Leave to boil for at least 3 minutes while stirring continuously. Test the gelling. Stir in orange liqueur. Immediately fill jam to the brim into clean, dry glasses, close them.