Bauer's mustard made since 1888 in Ridgewood, Queens infused with black summer truffles from northern Italy. It contains pieces of truffles. 4 oz. The Truffleist creates artfully handcrafted truffle products at our headquarters in Long Island City, Queens. We offer the highest quality products, developed from masterfully curated truffle ingredients, allowing customers to create and enjoy exceptional and enticing dishes.