Preheat the oven to 160 degrees C fan.
Butter/oil the springform & cover bottom & edges w/ fine breadcrumbs
Shred the carrots.
Mix flour & baking powder.
Combine butter & sugar (incl. vanilla sugar) & salt w/ the handheld mixer.
Add eggs.
Add spices.
Add flour.
Add sour cream.
Fold in the shredded carrots w/ a tablespoon.
Pour the dough in the prepared springform & put it in the preheated oven for about 35-40 min.
Make the test w/ the wooden skewer - you know...
Let the carrot cake cool down. After about 5 min remove the edge of the springform.
When the cake is at room temperature transfer the cake from the bottom of the springform to its final plate.
For the frosting mix butter (best at room temperature!), cream cheese, salt, lemon zest, icing sugar & lemon juice - in this order - w/ an egg whip until smooth.
Add frosting to the cake.
Optional: decorate w/ marzipan carrots.