Take a large bowl and mix together: marzipan, powdered sugar, flour, ground almonds and egg white.
Preheat the oven to 150 degrees Celsius.
Prepare a medium size bowl with a cold water and make sure you keep your hands wet while dealing with marzipan. Form small cones (higher then an almond halve) from the dough and decorate each one with 3 almond halves. Remember to keep you hand wet!
Bake for 10 minutes.
Mix water with egg yolk and after 10 minutes has passed, brush your cookies using just a little bit of egg mixture. We just want the top of the cookie to be nice and brown!
Bake your cookies for another 5 minutes.
