Leprino Foods is an American company with headquarters in Denver, Colorado that produces cheese, lactose, whey protein and sweet whey. It is the world's. Leprino began as a small family-owned grocery business and began making cheese. Today, Leprino Foods possesses a significant share of the U.S. Italian. May 23, AN AVALANCHE OF CHEESE pours into the test kitchen at the Denver headquarters of Leprino Foods, the mozzarella supplier to Pizza Hut.