How to make
Beat butter with powdered sugar, until it becomes a smooth cream. While continuously beating, add 1 egg and 1 egg yolk, then finely crushed cookies, nuts, cocoa, vanilla, lemon peel and rum.
Stir the mixture well, pour it in parchment paper and shape it into a roll. Put in the fridge to harden for a few hours.
Unwrap the cookie rolls, sprinkle them with powdered sugar and make colorful decorations as desired.
