Cream fat, sugar, vanillin sugar and salt. Stir in the eggs one by one. Mix flour and baking powder, sieve and stir in. Stir in almonds and milk. Spread the dough on a greased baking tray (30 x 40 cm). Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 25 minutes.
Let the cake cool down a little. Sprinkle with liqueur or juice. Bring jam and 2 tablespoons of water to the boil, possibly passing through a sieve. Spread it on the cake with a brush. Sieve 70 g icing sugar. Knead marzipan with it. Roll out to the size of the cake on the work surface dusted with icing sugar, roll up from the short side and roll back over the cake, press lightly. Cut off the edges of the cake all around. Cut the cake lengthwise into 3 rows (approx. 9 cm wide), cut the rows into triangles each 5-6 cm wide, push the triangles together again to form a plate. Mix 300 g icing sugar and lemon juice, spread 2/3 on the cake. Separate the cake pieces and let them dry. Cut the rest of the icing in half, one half red, the other green.
Roll out to the size of the cake on the work surface dusted with icing sugar, roll up from the short side and roll back over the cake, press lightly. Cut off the edges of the cake all around. Cut the cake lengthwise into 3 rows (approx. 9 cm wide), cut the rows into triangles each 5-6 cm wide, push the triangles together again to form a plate. Mix 300 g icing sugar and lemon juice, spread 2/3 on the cake. Separate the cake pieces and let them dry. Cut the rest of the icing in half, one half red, the other green. Pour the icing into freezer bags, splash red and green firs on the triangles. Leave to dry