Use royal icing and wax paper to make designs. When they harden, add them on top of wet icing on cookies.
Le Torte di Antonella Cacossa e non solo...: Corso ghiaccia a Roma 4 dicembre 2016
Making chocolate decorations
chic chocolate decoration
Chocolate and Royal Icing Templates on Pinterest
Black and White Flowers | Cookie Connection
Turtle Cuppies Recipe and Royal Icing turtle tutorial...say that 3 times, fast!
Royal icing cake. Interesting technique. I'll have to try this.
Tiara from royal icing - site is in Dutch, but you get the gist...