Clean, peel, wash and finely grate the carrots. Drizzle with 3 tablespoons of lemon juice.
Preheat oven (electric stove: 175 ° C / convection: 150 ° C / gas: level 2)
Mix the fat, sugar, vanilla sugar and salt with the whisk of the hand mixer until creamy. Stir in eggs one at a time. Mix the flour, baking powder and ground almonds and stir into the fat and egg mixture. Fold in the grated carrots and chopped almonds.
Grease the oven pan (32 x 39 cm) and dust with flour. Pour in the dough and smooth it out. Bake in the preheated oven for 25-35 minutes. Remove and let cool on a wire rack.
Mix 250 g of powdered sugar with 6-8 tablespoons of lemon juice to a smooth glaze. Pour the topping on the cake and spread it smoothly, let it dry. Decorate with the marzipan carrots.