I don't blame you if your initial reaction to this post is "That doesn't look like an orchid." Well, since there are as many as 26,049 currently accepted species, I picked this one at random. All you'll need to pipe a basic white orchid is stiff consistency royal icing, a petal tip #104, a flower nail, a glue stick, parchment paper squares, a Styrofoam brick to rest the nail in, and a dusting pouch filled with a 50/50 blend of cornstarch and powdered sugar. Start by sticking a parchment square to the flower nail with a dab from the glue stick.
color dust or petal dust. Place several of them in a wreath on a cake and you'll have a lei!