Lefèvre-Utile, better known worldwide by the initials LU, was a French manufacturer brand of biscuits, emblematic of the city of Nantes.

[4] The Petit-Beurre biscuit remains the flagship product alongside the Ladyfinger, Champagne, Petit four, Prince de LU, Pim's, Paille d'Or, etc.

Bouisset, already noted for his work for the Menier Chocolate company, created Petit Écolier ("the Little Schoolboy") which incorporated the LU initials.

Bouisset's poster was used extensively and the image was embossed on the company's Petit Beurre line of biscuits.

[citation needed] Although an international brand today, LU products are primarily distributed in Western Europe, and in 2005 represented nearly half of the sales for Danone's biscuits and cereal division.