Welcome to the Cake Decorators Q&A

Do you have any tutorial about piping letters on a cake? Thank you! Elisa

Hello babeebubu

Royal icing lettering tutorials can be found in several lessons, here are two:
http://www.cakeflix.com/online-cake-decorating-courses/chocolate-buttercream-cornelli/lesson-5-adding-decoration

Decorating with Royal Icing

In the first link fast forward the video to 5.36 if you dont want to watch the whole lessons.

Thank you so much!! Elisa