Clean, peel, wash and finely grate the carrots. Sprinkle with lemon juice. Cream fat, sugar, vanillin sugar and salt. Stir in the eggs one by one. Mix flour, baking powder and almonds and stir into the egg-sugar mixture. Fold in grated carrots.
Grease a springform pan (26 cm Ø) and dust with flour. Add the dough and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes (convection oven 55 minutes). Let cool on a cake rack.
Knead the marzipan with 2 tablespoons icing sugar. Remove a small part and colour green. Colour the rest of the marzipan orange. Form about 16 carrots from the marzipan, lightly nick the surface with a knife. Form green marzipan in portions to a thin strand. Moisten the carrot lightly with water and, once the cord has been folded over, set it as "leaf green".
Remove the cake from the mould and dust with 1 tablespoon of icing sugar. Decorate with marzipan carrots.