It's not good for drinking, but as long as it isn't clumpy, it's good for cooking. ( Toss it if it's clumpy.) Use sour milk as a substitute for buttermilk in your favorite recipes.
Pasteurized milk, once spoiled, isn't useable. If you tried to use spoiled milk in your baking, your baked goods would taste off so it's best to just throw it out.
Milk is usually good for up to a week past the date on the container. Just smell it and possibly even taste it. If you used it to cook with, it more than likely won't make you sick. It's probably safe to still drink it.
Milk that has gone sour can replace buttermilk or sour cream in any baked items. Combine soured milk 'buttermilk' with breadcrumbs, and you'll get the lightest of light results. The soured milk acts as a leavening agent, lifting and lightening the baked item.
However, there is also the potential for harmful pathogens transferring to milk produced by sick cows or dairies with unsanitary milking conditions. Boiling milk will effectively eliminate all microbiology - good and bad. On the positive side, if there were any harmful pathogens, now there aren't.
However, most commercially packaged milk is pasteurized, which means it's already been heated to kill harmful bacteria. For pasteurized milk, boiling is usually unnecessary. Always check packaging and follow local health guidelines for the safest consumption.
A small sip of spoiled milk is unlikely to cause symptoms beyond a bad taste. Drinking larger amounts of spoiled milk can cause stomach distress resulting in abdominal cramping, vomiting, and diarrhea (like a food-borne illness). In most cases, symptoms caused by drinking spoiled milk resolve within 12-24 hours.
Your sense of smell and taste are your best friends here, and they'll give you the best indication of whether the milk is ok to drink – if it doesn't smell, look strange (lumpy or separated), and it tastes just fine, then you're okay to drink it.
Bin it: If composting or using it in the garden isn't an option, you can dispose of old milk with your regular household waste. Pour the milk into a sealable container, such as an old milk carton or a plastic bottle, and place it in the bin. This method prevents the milk from leaking and causing a mess.
Boiling might kill those bacteria, but it won't remove the acid or reverse the curdling, so the milk would be 'safe' but also still sour and chunky, and entirely disgusting to try and drink.
Color — Throw away milk that has a slightly yellowish or greenish tint. Keep in mind that spoiled milk can also appear white, so color shouldn't be your only test. Smell — Fresh milk has a very mild scent. If milk smells sour or off, don't risk drinking or cooking with it.
Another smart way of reusing old milk is adding it to prepare cakes, cookies and other sweet and savoury breads and baked delights. In fact, old milk can be used in baking recipes such as pancakes, waffles, cakes, muffins, and breads. The slightly sour taste of old milk may even add a subtle tang to baked goods.
Spoiled milk is not synonymous with sour milk. While certain bacteria can cause milk to turn sour (that is, to turn acidic and curdle, similar to recipes that instruct you to add a splash of vinegar to fresh milk), “spoiled milk” may carry any number of contaminants.
It's surprising how many recipes are out there to use up sour milk. Mac 'n cheese is just one of them.
Besides the unpleasant taste and smell, spoiled milk can cause nausea, stomach cramps, or diarrhea. If you use spoiled milk for baking, the oven heat destroys most of the harmful bacteria so there is less of a chance that you will get sick from it.
Milk sickness, also known as tremetol vomiting, is a kind of poisoning characterized by trembling, vomiting, and severe intestinal pain that affects individuals who ingest milk, other dairy products, or meat from a cow that has fed on white snakeroot plant, which contains the poison tremetol.
Any bacteria in spoiled milk would die in the baking process. So, it is safe to use in baking or cooking.
If it's badly spoiled and you drink more than a sip before realizing it, and don't spit it out, and you have a weak immune system, you might get sick in an hour or two. Or not at all. (Edit: If it's pasteurized, you won't get sick at all.) Since it has a pretty bad odor, most people won't even drink any at all.
1. Marinating meat: Expired milk can tenderise and flavour meat. Create a marinade by mixing expired milk with herbs, spices, and a bit of acid like lemon juice or vinegar. Let the meat soak in the mixture for a few hours or refrigerate overnight.
Milk can typically be good for 5 to 7 days after the "sell by" date if stored properly in the refrigerator at or below 40°F (4°C). However, its freshness depends on how it's been handled and stored, so always check for signs of spoilage, such as sour odor, curdling, or changes in texture.
Salmonella infection is usually caused by eating raw or undercooked meat, poultry, and eggs or egg products or by drinking unpasteurized milk. The incubation period — the time between exposure and illness — can be 6 hours to 6 days. Often, people who have salmonella infection think they have the stomach flu.
“Sour milk is a dairy product that is safe to consume, while spoiled milk is not safe to consume,” Maeng says. “Sour milk is produced by either a fermentation process or by adding an acid, such as vinegar or lemon juice, into the milk.
Treatment may include the following: