Melt the butter. Fill the biscuits into a freezer bag and crumble them with a dough roll by applying light pressure. Mix cookie crumbs and butter. Spread 8 tartlet forms (with lift-off base) with oil and fill the bases evenly with crumb mass. Press the crumb bases lightly and chill for about 30 minutes. In the meantime soak the gelatine.
Mix cream cheese, sour cream, bitter lemon, vanillin sugar and sugar. Squeeze the gelatine and dissolve. Stir in 3 tablespoons of cream cheese mixture, then stir into the mixture. Wash the redcurrants, strip half of the panicles and spread on the tartlet bottoms. Add the mixture and chill for 2 hours. Decorate with the remaining currants and dust with icing sugar