Can Cooking Oil Be Reused?

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There is a lot written in the media about not to save the oil or ghee that has been used for frying for re-use. As it is, frying once changes the composition of the fat/oil so it seems that twice used fat must be horrible. There is an even greater health risk when you cook with pre-cooked oil/ghee.

Is it safe to reuse cooking oil

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Actually, reusing cooking oil has been done for ages. There isn’t really is any problem, if done properly. The greatest hazard is allowing the oil or ghee to become spoiled to the point that it produces undesirable flavours and odours. When oil becomes spoiled, it appears dark and thick. Besides ruining what would have been a perfectly good meal, spoilt oils also contain free radicals that are potentially carcinogenic.

To understand how to best re-use oil, it is important to know about smoke points – the temperatures at which oil begins to decompose. If you heat oil to a temperature that is too high, it produces smoke fumes. Acreolin, a substance that makes your eyes burn, is given off as well. To re-use oil safely, use these tips: strain it through a few layers of muslin cloth to catch any food particles. Be careful with hot oil, though, because you can easily get burned. Shake off excess batter from food before frying it. Turn off the heat after you are done cooking. Also exposing oil to prolonged heat accelerates rancidity. Do not ever mix different types of oil. Store all oils, fresh or used in a cool, dark place. Avoid iron kadais for frying oil that is to be reused. The metal also accelerates rancidity.

The optimal temperature to fry foods at is 190°C At higher temperatures, the food will burn on the outside and at lower temperatures, the food absorbs too much oil and tastes greasy. Different oils have different smoking points. Oils with higher smoking points are better for frying. For example, safflower, sunflower, soyabean. The more popular ones like groundnut oil have a lower smoking point. And olive oil has the lowest. This explains the reason why olive oil is never used for deep frying.

Source: chefsanjeevkapoor

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