A cook is grilling beef burgers (ground beef patties) to order. Under California Retail Food Code §114004, what is the minimum internal cooking temperature and time?

Explanation

California Retail Food Code HSC §114004 requires ground or comminuted meats — including ground beef burgers, ground pork, mechanically tenderized meat, and injected meats — to reach an internal temperature of 155°F for at least 17 seconds, or an equivalent in the time-temperature table (e.g., 158°F for 1 second, 150°F for 1 minute, 145°F for 3 minutes). The 10°F higher target compared with intact whole-muscle beef (145°F for 15 seconds) is microbiological: grinding distributes surface bacteria such as Shiga toxin-producing E. coli O157:H7 throughout the entire mass, so the geometric center of the patty (the coolest point) must reach a lethal temperature. Option A is the rule for intact whole-muscle beef steaks/roasts and is unsafe for ground product — it is the cause of repeated documented E. coli outbreaks. Option C overshoots; 165°F is reserved for poultry, stuffed meats, and reheated leftovers. Option D ignores that 'rare' ground beef is not a legal preparation under the code unless served under a consumer advisory and only with explicit local approval; the 135°F/4-minute combination does not appear in the ground-meat row of §114004.