Le Viandier (often called Le Viandier de Taillevent) is a recipe collection largely credited to Guillaume Tirel, alias Taillevent. However, the earliest version of the book has been dated to around 1300, about 10 years before the birth of Tirel. The original author is unknown, but it was not uncommon for medieval and early modern recipe collections to be plagiarized, complemented with additional material and presented as the work of later authors.