The main purpose of preheating the oven is to quickly bring the temperature to the desired temperature for baking. If you don't preheat the oven, it heats up slowly and takes longer to cook. In this way, some foods will not achieve the stereotypic effect, and it may also lead to the loss of nutrients in the food, so that we can not get the nutrients in the food.

It usually takes 10-20 minutes to preheat the oven. One is to heat the oven evenly; Two is to quickly adjust the temperature to the temperature that the food needs; Third, it can shorten the baking time; Four is to avoid the appearance of food scorched, but the inside is not cooked.

Preheating the oven can not only make the baked food more crisp, but also achieve the effect of sterilization to a certain extent.

It should be noted that the oven preheating is empty baking, if preheating time is short, may not reach the specified temperature; However, the oven should not be preheated for a long time, as this may affect the service life of the oven.

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