Isigny St Mere AOP Butter Demi-SelThe Best Butter in the World. In a 5kg Basket. If you know, you know. Isigny Sainte Mre AOP butter has been the gold standard of French butter since the end of the 16th century the choice of the world's greatest chefs, and the secret weapon of anyone who takes their cooking seriously. This magnificent 5kg basket of lightly salted demi sel butter is for those who refuse to compromise. Whether you're running a professional kitchen or simply believe that