RecipeSour cream - 180 gr (unsweetened yogurt)Egg - 1 pieceSugar - 2 tbspBaking powder -1h.lButter butter - 150 gramsFlour - 550 gramsFillingWalnut - 200 gramsSugar - 4 tbspApricot jam - 2 tbspBake at t 200°C 25 - 30 minutes