How to Reduce the Odor of Organ Meats

The most effective way to reduce the strong odor of organ meats is to soak them in milk or lemon water for at least 30 minutes before cooking. Milk mellows the odor by absorbing some of the compounds that cause it, while the acidity of lemon juice directly neutralizes odors. Soaking also tenderizes the meat, giving it a softer texture after cooking. Because organ meats such as liver, tripe, and kidneys spoil quickly, checking freshness as well as reducing odor is important for food safety.

How can you reduce the odor of liver?
Put sliced liver in a container and cover it completely with milk; let it sit in the refrigerator for 30–60 minutes to noticeably reduce its odor and tenderize it. If you do not have milk, lemon water can produce a similar result in the same amount of time. When the soaking time is up, drain the liver and pat it dry with a paper towel; a wet surface steams instead of browning in the pan.

How can you reduce the odor of tripe?
After rubbing tripe clean in a bowl of vinegar water, taking care not to splash, boil it for a long time with onion, a bay leaf, and a few peppercorns. This long simmer greatly reduces both the odor and toughness. Afterward, wash the bowl, sink, and your hands with hot, soapy water. If you change the boiling water once, some of the foam and odor from the first water will also be removed. Tripe usually takes hours to cook through; undercooked tripe stays tough and retains its odor.

Why are kidneys blanched before cooking?
Cut the kidney in half, remove the whitish membrane and tubes inside, and blanch it in boiling water for a few minutes; this preliminary blanch removes much of the liquid responsible for the kidney’s strongest odor. After pouring out the blanching water, rinse the kidney in cold water and continue with the main cooking. If this step is skipped, the kidney’s odor may carry into the finished dish; a brief blanch greatly reduces this risk.

How can spices and vegetables reduce odor?
Strong spices such as cumin, thyme, and black pepper do not eliminate the odor of organ meats completely, but they noticeably mask it; cumin is especially common in liver and kidney dishes. Onion and garlic have a similar effect when added to the boiling or cooking liquid. Add the spices near the end, when the organ meat is almost cooked, so their aromas can work before evaporating.

How can you choose fresh organ meats so they have less odor to begin with?
Fresh liver should be a bright reddish-brown and should not have a sharp, ammonia-like odor; a strong smell can be an early sign of spoilage. For tripe and kidneys, a moist but not sticky surface is another sign of freshness. Cook organ meats on the day you buy them or consume them within 1 day at most; this group of meats spoils much faster than other kinds of meat. Shopping at a trusted butcher is the most practical way to make sure organ meats have stayed in the cold chain until they reach the counter.

Quick summary
Soaking organ meats in milk or lemon water for 30 minutes or longer noticeably reduces their strong odor; tripe needs a long simmer, while kidneys need a preliminary blanch. Strong spices such as cumin help mask odors. Choosing fresh organ meats reduces odor from the start; because this group spoils more readily than other meats, it is recommended that you cook it the same day you buy it.