Beurre d'Isigny AOP Churned Butter with Sea Salt CrystalsThe World's Finest Butter. With a Satisfying Crunch of Sea Salt. Isigny Sainte Mre has been producing the world's most celebrated butter since the end of the 16th century and this version takes it one step further. Churned in the traditional method from the milk of Norman cows grazing on the mineral rich coastal pastures of Cotentin and Bessin, this AOP butter is already extraordinary. Then come the sea salt crystals. Those little bursts of salt