Grease a wreath mould (26 cm Ø; approx. 2.5 l capacity) or springform pan with a tube bottom insert (26 cm Ø; approx. 8 cm high) and dust with flour. Peel apples, possibly quarter them, core them, then grate them roughly. Mix with 3 tbsp. juice
Cream fat, 375 g sugar, vanillin sugar and 1 pinch of salt. Stir in the eggs one after the other. Mix flour and baking powder and stir in portions briefly. Fold in grated apple. Spread into the mould. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for about 1 hour. Cool in the mould for 10-15 minutes
Bring 75 ml water, whisky and 75 g sugar briefly to the boil, then simmer for 3-5 minutes while stirring. Turn the cake out of the tin, possibly put it into a fat pan. Immediately prick several times with a wooden skewer and sprinkle with the whisky stock. Let the cake cool down. Leave covered for at least 5 hours.
Caramelise 50 g sugar in a frying pan until golden. Stir in almonds. Spread on baking paper. Cool down
Mix 75 g icing sugar and 1-2 tablespoons lemon juice. Fill into a plastic bag, cut off a small corner. Decorate the cake in strips with it. Coarsely chop the almond brittle and sprinkle over it. Let the icing dry. Dust the cake with icing sugar before serving