Salted butter caramel shortbread

Our shortbread with shards of salted butter caramel from Isigny crunches under the tooth before melting in the mouth. It is made by hand with PDO butter, Label Rouge free-range eggs from Loué, sugar from Hauts de France, Tradition flour from Eure-et-Loir and a pinch of salt. Presented in a 115g cardboard box, with a white paper bag inside.