Part 4/7:
Next, we turn to the heart of the burger—the beef patty. Contrary to some myths, all beef patties served at McDonald's are crafted from 100% USDA-inspected beef without fillers or extenders. The beef is sourced from various farmers across the U.S., chosen for its specific fat content, which consists of an optimal 80% lean and 20% fat mix meant to provide the right level of juiciness.