Sablés

Sablé is a French round shortbread cookie that might have originated in Sablé-sur-Sarthe in Sarthe. According to the letters of the Marquise de Sévigné, the cookie was maybe created for the first time in Sablé-sur-Sarthe in 1670. The French word sablé means "sandy", a rough equivalent of English "breadcrumbs". Generally, the baker begins the process by rubbing cold butter into flour and sugar to form particles of dough until the texture resembles that of breadcrumbs or sand.

Source: Wikipedia