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Why must you always preheat an oven when cooking?

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2009-09-28 01:47:05
2009-09-28 01:47:05

Most cooking times are worked out for a preheated oven. This is because different ovens may have different heating up periods because of varying insulation or element sizes. For recipes to be consistent for any possible oven, they cannot take all the possible variations for preheating into account, and therefore require that the oven is already at temperature before cooking starts.

When you are familiar with how long your oven takes to heat up you can experiment with the oven not fully heated before using, but note that this will not work with some recipes that require a quick change of heat.

If not preheating, set the timer for at least an extra 2 minutes. Ovens vary in cooking time even after preheating.

Check the recipe before cooking. Sometimes preheating is, and sometimes preheating is not, necessary.

If you need to cook something in the oven for a specific amount of time at a specific temperature, then it must be cooked at that temperature the WHOLE time. If it takes 10 minutes to preheat it to 300 degrees, and you put the food in WITHOUT preheating, you undercook it, and if you out the food in WHILE preheating, you end up overcooking it.

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Related Questions


Preheating an oven will cause whatevr your baking to cook evenly


To always Preheat your Oven -xoxo


"Preheat" is a verb, as in, "Go preheat the oven, please." Preheat is a noun, as in, "The label next to the oven knob said, 'Preheat' ".


It heats your oven up. So when you put your food in the oven is already hot but you dont have to let it heat up first you could always just put your food straight in the oven, its entirely up to you! xxx


You typically preheat to the temperature at which you will be cooking. For example, if a frozen pizza instructions say to preheat to 450˚, it means that they want the oven to be up to 450˚ before you put the pizza in for the designated cooking time.


so that your food doesn't get burnt


An oven needs to be preheated for proper cooking temperatures and times. If an oven is not brought up to temperature, it can cause whatever is being cooked to cook unevenly or improperly.


Without knowing the composition of your cooking vessel, altitude, etc. Preheat oven to 250 degrees. Bring to boil then immediately place in heated oven. Minimize opening oven during this time.


Heat the oven in advance before placing the product into the oven for baking for a precise outcome


I can preheat the oven for 30 mins.


You would preheat the oven for an eggless chocolate cake in the same way you would preheat the oven for any other type of cake: turn the oven on, set the thermostat to the required temperature, then wait for the oven to reach that temperature.


You need to preheat the oven so that it can warm up before you bake. If you do not preheat, the food will bake while the oven is heating up and therefore the recipe will not be as accurate as intended.


turn the oven to the baking/cooking temp before you actually start putting stuff together - with the goal being the oven will be at full baking/cooking temp a couple of minutes before you're ready to put your stuff in.


You do not preheat a microwave. A microwave heats the food, not the oven. With nothing in the oven it will not heat up.



Check the recipe before cooking. Sometimes preheating is, and sometimes is not, necessary.If you need to cook something in the oven for a specific amount of time at a specific temperature, then it must be cooked at that temperature the WHOLE time.If it takes 10 minutes to preheat it to 300 degrees, and you put the food in WITHOUT preheating, you undercook it.And if you out the food in WHILE preheating, you end up overcooking it.



keep it in a warm place the inside of an oven is always warm you don't have to preheat it or anything


According to Encyclopedia Brown #15 1/2, it takes at least 20 minutes to preheat an oven.


The answer to your question would depend on how long your oven takes to preheat. Experiment and see for yourself.


It depends on the kind of oven,but most times yes


It means to turn the oven on to the heat that is stated. For example if it says preheat to 150 degrees then turn the temperature knob to 150


Preheating the oven insures that the oven is the same temperature needed for baking


It is Must to Preheat your oven (200 deg c) before you cook cake, you will get well cooked cake within 15 Mins


Preheat oven to 325 degrees. Shake flour in oven cookingbag. Place in 13"x9"x2" ... top. Bake 1 1/2 hours or until tender. Makes 4 to 6 servings.Ingredients: 6 (bag .. flour .. onion .. sauce ...)



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