https://www.wilton.com/how-to-pipe-an-outline/WLTECH-43.html
How to Pipe an Outline
Characters or designs are often outlined first, then piped in with stars or zigzags. Outlines can also be used for facial features.
Skill Level:
None
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Additional Information
Step 1
Hold bag at 90° angle and touch tip to surface. Squeeze at starting point so that icing sticks to surface.
Step 2
Now, raise the tip slightly and continue to squeeze. The icing will flow out of the tip while you direct it along surface.
Step 3
To end an outline, touch tip back to surface, stop squeezing and pull away.
Step 4
To smooth icing: After outlining and filling in area with icing, pat smooth using finger dipped in cornstarch.
