For the currant layer dessert, place the butter cookies in a frozen bag and crumble into small pieces with your hands. Puree the currant.
Mix 150 g of currant with 40 g of sugar well, mix the remaining currant with the rest of the sugar, the vanilla sugar and the yogurt.
Cover the bottom of a glass with cookie crumbs, now a layer of currant yogurt, then another layer of cookie crumbs and this time the currant-sugar mixture. Then another layer of cookie crumbs and finish with currant yogurt.