Why color isn't a doneness test
Beginner Kitchen science
Why color isn't a doneness test is the pink or brown color of meat depends on its chemistry, not only its temperature, so only a thermometer tells you it is safe.
Written with AI help from the sources listed, and published by Cory. Spot a mistake? Tell us and we'll fix it.
How do you do it?
- Check ground meat with a thermometer: 160°F for beef and pork, 165°F for poultry, whatever the color.
- Measure in the thickest part, away from bone, and check more than one burger or piece.
- Do not worry about a pink smoke ring under the bark of smoked meat if the temperature is right.
- For steaks and roasts, use temperature for both safety (145°F plus a 3-minute rest) and doneness.
Why does it work?
Meat gets its red color from myoglobin, a protein that holds oxygen. Heat changes myoglobin from red to tan and brown, but the change does not happen at a fixed temperature. Ground beef that was frozen, thawed or stored a while can brown well before 160°F, looking done while still unsafe. Fresher meat, or meat with a higher pH, can stay pink even when fully cooked. In young poultry, pigment from the bone marrow can tint meat near the bone pink at 165°F. Smoke and some vegetables contain nitrogen compounds that lock myoglobin in its pink form, which is why smoked and cured meats stay pink. The thermometer is the only honest test.
What are the common mistakes?
- Calling a brown burger done — it may not have reached 160°F inside.
- Overcooking pink-near-the-bone chicken that reads 165°F — it is safe, now it is dry.
Still stuck? Watch someone do it on YouTube.
More kitchen science
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- How heat changes proteins: why eggs set and meat firms upHeat makes proteins unfold and bond to each other, which turns runny egg solid and soft raw meat firm, opaque and drier.Intermediate