What Is the Ideal Internal Temperature for a Burger?

Cooking a burger to the right internal temperature is both a food safety question and a quality question. Too low and you risk under-cooked beef. Too high and you end up with a dry, overcooked patty. The target range depends on your doneness preference — but for ground beef, the safety threshold is non-negotiable.

Why ground beef has different rules from steak

A whole muscle cut like a steak carries bacteria only on its exterior surface. When you sear a steak hot on all sides, you are eliminating those bacteria even if the interior remains rare. Ground beef is fundamentally different: the grinding process mixes the exterior surface throughout the entire patty. That means any bacteria present on the surface of the original cut are distributed through the whole mass of meat.

This is why food safety authorities in most countries — including Indonesia, Australia, the United States, and the EU — recommend cooking ground beef to a higher internal temperature than whole muscle cuts. The safe recommendation for ground beef is 70°C (160°F) held for at least 15 seconds.

Temperature guide by doneness

While food safety authorities recommend 70°C for ground beef, many restaurants — particularly those that source high-quality, traceable beef — cook to lower temperatures based on their assessment of supply chain quality and pathogen risk. The table below covers the full range:

• 60°C / 140°F — Medium rare: Warm pink centre. Juicy, soft texture. Not recommended for commercial ground beef from unknown sources. Possible in controlled supply chains with whole-muscle grinding at service.
• 63°C / 145°F — Medium: Slightly pink centre. Good moisture retention with more firmness than rare. Considered safe for whole muscle cuts; still below the recommended minimum for commercial ground beef.
• 70°C / 160°F — Well done: No pink. Firm texture, slightly drier. This is the temperature recommended by food safety authorities for ground beef to eliminate pathogenic bacteria including E. coli O157:H7.
• 74°C / 165°F — Fully cooked through: Thoroughly done, firmer, and noticeably drier. The temperature required for poultry and often used as a margin of safety beyond the 70°C threshold.

How to measure it accurately

The only reliable way to know the internal temperature of a burger patty is with an instant-read thermometer. Insert it horizontally through the side of the patty, pushing the probe to the centre. Reading from above through the top of the patty is unreliable because the probe tip may be touching a hotter or cooler zone than the true centre.

Allow the thermometer to stabilise for 2–3 seconds before reading. Remove the patty from the heat just before it reaches the target temperature — carryover cooking will raise the internal temperature by 2–3°C as the patty rests off the heat.

What happens to the patty at each temperature

The texture of a burger patty changes significantly across this temperature range because of what happens to the proteins inside the beef. Myosin, one of the main structural proteins, begins to denature at around 50°C, causing initial firming. Actin, the other key structural protein, denatures at around 65–70°C, causing a more pronounced tightening that squeezes moisture out of the meat. This is why the difference between a 65°C and a 75°C patty is so noticeable in terms of juiciness.

Fat also plays a role: a patty with a higher fat ratio retains more perceived juiciness at higher temperatures because the rendered fat compensates for the moisture lost as the proteins contract.