Knead marzipan, sugar, and egg whites together to form a uniform dough. The dough should be sticky.
Dust the table and your hands with powdered sugar so it doesn't stick.
Roll the dough out into long rods, cut them to size, and form rings on a baking tray (Instructions with measurements follow at the bottom).
Place the baking tray on an extra tray (to prevent the Kransekage from getting too much heat at the bottom).
Bake in the middle of the oven until golden, keep a close eye on them, it takes 6-8 minutes at 250 degrees Celsius (482 degrees Fahrenheit) (482 Fahrenheit).
Mix powdered sugar, egg whites, and white wine vinegar in a bowl.
Pour the icing into a piping bag, making only a SMALL hole in the bag for optimal results. Use smooth movements over the cakes and let the icing dry.
Dip the cakes in melted chocolate and assemble them on top of one another.
Find a suitable clock face, if you have an old clock (here an IKEA clock was used), or make your own from cardboard, chocolate, or whatever you fancy.
Make 2 rings that can go around the clock face, ensuring the numbers on the dial are visible.
Make a sturdy base of 2 slightly thicker rings; they should be able to support the weight of the clock.
The following measurements are used
Measurements:
14 cm, 16 cm, 18 cm, 20 cm, 22 cm, 24 cm, 26 cm
Follow the measurements for the Kransekage tower, but finish with a small top to close the hole.
Shape the rods into cigar shapes, which are thin at the ends and thickest in the middle.
Form into rings and bake.
If you want your cornucopia to stand upright, make 2 additional rings that should be slightly thicker since they need to support the weight of the whole horn. Otherwise, assemble your cornucopia lying down.
Use caramelized sugar to assemble the cornucopia and support it during the building process.