Cream the fat, 200 g sugar, 1 packet of vanillin sugar and salt. Stir in the eggs one by one. Mix flour, cornstarch and baking powder, stir into the mixture alternately with the milk. Grease a ring mould (2.8 litres capacity) and dust with flour. Pour in the dough and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 40 minutes. Let the cake rest in the pan for about 10 minutes.
Turn out onto a cake rack and let it cool down. Cut the ring twice horizontally. Stir the jam until smooth, except for 3 tablespoons for decorating, spread everything on the bottom base. Stir the curd with the whisk of the hand mixer until smooth, pouring in the sauce powder. Stir for about 1 minute. Mix the cream firmer, 40 g sugar and 2 sachets of vanillin sugar. Whip the cream until stiff, allowing the mixture to trickle in. Stir the cream in 2 portions with the whisk of the hand mixer into the quark mixture. Spread 1/3 of the cream on the jam. Pour the second cake layer on top, spread 1/3 of the cream on top. Place the upper cake layer on top. Spread the remaining cream on the wreath and sprinkle with brittle.
Whip the cream until stiff, allowing the mixture to trickle in. Stir the cream in 2 portions with the whisk of the hand mixer into the quark mixture. Spread 1/3 of the cream on the jam. Pour the second cake layer on top, spread 1/3 of the cream on top. Place the upper cake layer on top. Spread the remaining cream on the wreath and sprinkle with brittle. Decorate with jam. Keep cool until serving
waiting time approx. 2 hours