Sea salt, kosher, coarse - comfort food for the soul. Estd 1888. Plain: protected against humidity and moisture. Manischewitz knows kosher! Straight from the kitchens of Jewish grandmothers, our kosher salt brings gourmet flavor to any home-cooked meal, holiday and every day. The real deal! Not only is our salt certified kosher, it is extracted from the crystal clear waters of the Mediterranean Sea - giving our salt its rich flavor and coarse texture. Facebook. Pinterest: @manischewitz. Twitter. Instagram: @manischewitzco.