Piping borders

Piping borders is using a decorating bag and tip to make repeating patterns of icing along the edges of a cake.

Piping borders: A cake base edge piped with a continuous shell border of white buttercream, each shell with a small curved tail.
  • Techniques and preparation methods

Also called: shell border

Borders frame a cake and hide the seam between layers and plate. A University of Wyoming extension manual notes that borders need a medium-stiff icing, firmer than the icing used for writing.

Shells are the best-known border. The manual says to hold the bag at a 45 degree angle with the tip slightly touching the surface and squeeze with heavy pressure until the icing builds and fans out into a full base. Then the cook lifts the tip slightly and relaxes the pressure while pulling the tip down to make a tail. Each new shell starts slightly behind the previous shell's tail.

A culinary school guide calls shells the foundation of one of the most popular cake borders. Beads, rosettes and stars are other common border shapes.

Related entries

Sources

Written by VanillaGoods in our own words from these sources. Last reviewed October 15, 2026.

  1. Cake Decorating manual (4-H 42500), University of Wyoming Cooperative Extension
  2. 7 Cake Decorating Techniques Every Pastry Chef Needs to Know, Escoffier Online