Is Pink Ground Beef Safe? Why Color Misleads, Use 160°F

Color tells you very little about whether a burger is done. USDA's Food Safety and Inspection Service (FSIS) says a ground beef patty cooked to 160°F can look brown, pink, or anything in between, and a patty can turn brown well before it gets there. The only reliable check is an instant-read thermometer reading 160°F. Details below reflect FSIS guidance as of October 2026.

1. The two ways color fools you

FSIS describes two opposite problems.

1.1. Brown before it is safe

Some patties lose their pink color before they are fully cooked. FSIS ran its own survey: researchers cooked patties from ground beef bought around the country, and more than 25 percent turned brown prematurely, before reaching 160°F. An earlier Kansas State University study found enough patties browning early that color was an unreliable signal. FSIS also reports patties that looked well-done at internal temperatures as low as 131°F.

The cause is mostly the pigment in the meat. Myoglobin is purplish-red when it has no oxygen and turns bright red when it combines with oxygen. If meat sits a long time, sits above proper temperatures, or has too much air exposure, the iron in the pigment changes form and the pigment turns brown (the brown form is called metmyoglobin). Ground beef is especially prone to this because grinding exposes more surface to air. Meat that is already brown will not change color much as it cooks, so it can look finished while still raw in the middle. Thawing frozen beef for a long time, or keeping thawed beef in the refrigerator, can cause this early browning.

Older animals matter too. FSIS cites research on patties made from a mix of older and younger carcasses: those cooked to 131°F looked similar to those cooked to 140°F, and patties at 150°F were visually indistinguishable from patties at 160°F.

1.2. Pink after it is safe

The opposite also happens. FSIS says some ground beef stays pink above 160°F, for three reasons:

• High pH. Normal fresh muscle has a pH of 5.3 to 5.7. Meat with a pH of 6.0 or higher can stay pink even at 159.8°F.
• A lot of pigment, which is more common in meat from bulls. Most store ground beef is a mix of trimmings from many animals, so this varies from package to package.
• Low fat. Lean patties conduct heat less well and need longer cooking. FSIS cites cases of low-fat patties staying pink at 160 to 165°F.

So a pink center does not prove the patty is undercooked, and a brown one does not prove it is safe. That is why FSIS tells people to stop judging by color.

2. Why 160°F matters for ground beef

FSIS says E. coli O157:H7 can survive refrigerator and freezer storage and has been tied to outbreaks from undercooked ground beef since 1982. The most serious illness it can cause is hemolytic uremic syndrome, which can lead to kidney failure, especially in young children and older adults. FSIS also notes that eating pink ground beef patties without checking the temperature is a significant risk factor for foodborne illness.

The CDC lists the same numbers: 160°F for ground meats such as beef and pork, 145°F (plus a 3-minute rest) for whole cuts of beef, veal, lamb, and pork, and 165°F for all poultry and for leftovers and casseroles. The CDC says you cannot tell if food is safely cooked by color and texture, except for seafood.

3. How to take the temperature

FSIS gives these steps for patties:

1. Use a digital instant-read thermometer, toward the end of the cooking time.
2. Insert it at least one-half inch into the thickest part of the patty.
3. If the patty is too thin to check from the top, insert the thermometer from the side.
4. If the reading is doubtful, check a second spot.
5. Look for 160°F.

For meat loaf or a casserole, FSIS says to put the thermometer in the center.

4. Ground beef storage

The FSIS color page recommends using fresh or thawed ground meat quickly, within one day, or wrapping it tightly and freezing it. FSIS's separate refrigerator chart lists 1 to 2 days for raw ground beef, turkey, veal, pork, and lamb. If you want one rule that fits both, use or freeze it by the next day. FSIS notes that ground beef can turn prematurely brown after as little as one day of storage, so a brown color says little about cooking.

5. Eating out

FSIS says you can ask the server whether the patties were cooked to at least 155°F for 15 seconds. That is the FDA Food Code standard for restaurants and other food service, which hold the temperature for a measured time. It is a different number from the home guidance of 160°F, and the two are not meant to be mixed up. At home, use 160°F.

6. Key takeaways

• Do not use color to judge ground beef. FSIS found over 25 percent of fresh patties browned before reaching 160°F.
• Patties have looked done at 131°F, and lean ones have stayed pink at 160 to 165°F.
• Cook all raw ground beef to 160°F, measured with a thermometer at least one-half inch into the thickest part, from the side if thin.
• Use or freeze fresh ground beef quickly: FSIS says one day on one page and 1 to 2 days on its refrigerator chart.
• Restaurants use a different standard, 155°F for 15 seconds, from the FDA Food Code.