The blog of cooking-ez.com
Should I believe my oven?
Can you really trust your oven? This is an important question as we are always tempted to take the temperature indicated as gospel truth and, unfortunately, this is rarely very precise.
27K 20 4.6
Last modified on: July 4th 2011
Should I believe my oven?
When I set my oven to 200°C, is it really at that temperature? The actual temperature can be measured easily if you have an accurate thermometer.
To check my own oven (a “De Dietrich” model UMP501), I placed the probe of the thermometer in the oven, closed the door, set it to 200°C and noted the temperature at 30 second intervals over 20 minutes.
Ideally, of course, the oven should heat up rapidly to exactly 200°C, then stay at this temperature until I open the door to put the food in, or until I turn it off. Unfortunately, the reality is dramatically different. Here is the temperature curve recorded:
From this graph we can note that:
1) The oven takes 10 minutes to reach 200°. So far, so good.
2) It beeps to tell me that it has reached 200° when, in fact, it is only at 191°, which is not so good.
3) Although it is supposed to stop heating at 200°C, it goes up to 217° before coming back down to 186°, and from then on it varies 10 or 20° around the set temperature, which is far from ideal.
These variations are significant but, fortunately, not the end of the world for most recipes. A little hotter or cooler doesn't make that much difference, and can be compensated by a slightly shorter or longer cooking time.
But take care, even so, with recipes that require a precise temperature, such as macarons or foie gras. For these, it is a good idea to measure the oven temperature when it indicates that it is at the right temperature, then adapt the recipe accordingly.
This is somewhat disappointing, as my oven was quite expensive at the time, and the salesman promised me an oven that had “precise temperature control” . But then, when it comes to selling, they always promise the moon.
So, in the end, in answer to the question “Should I trust my oven?” the reply is definitely: no, you should not trust your oven. Instead, you should measure and calibrate it beforehand to know how it really performs.
And then, we're talking here about an electric oven. Just imagine what's involved with a gas oven…
To check my own oven (a “De Dietrich” model UMP501), I placed the probe of the thermometer in the oven, closed the door, set it to 200°C and noted the temperature at 30 second intervals over 20 minutes.
Ideally, of course, the oven should heat up rapidly to exactly 200°C, then stay at this temperature until I open the door to put the food in, or until I turn it off. Unfortunately, the reality is dramatically different. Here is the temperature curve recorded:
From this graph we can note that:
1) The oven takes 10 minutes to reach 200°. So far, so good.
2) It beeps to tell me that it has reached 200° when, in fact, it is only at 191°, which is not so good.
3) Although it is supposed to stop heating at 200°C, it goes up to 217° before coming back down to 186°, and from then on it varies 10 or 20° around the set temperature, which is far from ideal.
These variations are significant but, fortunately, not the end of the world for most recipes. A little hotter or cooler doesn't make that much difference, and can be compensated by a slightly shorter or longer cooking time.
But take care, even so, with recipes that require a precise temperature, such as macarons or foie gras. For these, it is a good idea to measure the oven temperature when it indicates that it is at the right temperature, then adapt the recipe accordingly.
This is somewhat disappointing, as my oven was quite expensive at the time, and the salesman promised me an oven that had “precise temperature control” . But then, when it comes to selling, they always promise the moon.
So, in the end, in answer to the question “Should I trust my oven?” the reply is definitely: no, you should not trust your oven. Instead, you should measure and calibrate it beforehand to know how it really performs.
And then, we're talking here about an electric oven. Just imagine what's involved with a gas oven…
Lasts posts
Wipe meats and fish before cooking
When you want to cook meat or fish, there's a very simple yet very important step to take before you even start: It's to dry, or wipe, each side of the meat or fish, sometimes called "dabbing" or "sponging". But why? And how? Let me explain.7045 April 14th 2024
Toss the salad
When you've finished preparing a salad, green or otherwise, it's usually time to add the dressing and toss. It's often said to "toss the salad", which means to season and mix. Is it easy? Not so easy...2,3515 March 8th 2024
Half milk, half cream
In a multitude of recipes, savoury or sweet, milk is used as the main ingredient, or at least as the main liquid ingredient. Milk is used instead of water, for example, because milk contains a proportion of fat, which adds roundness and softness to the recipe. This mellowness is very pleasant on...2,289 February 27th 2024
Cutting soft cheeses
As you may have already noticed, when you have to use a "soft" cheese in a recipe - their exact name is "soft cheese" - such as Camembert, Munster or Mont d'or, it's not easy to make anything other than thick slices.2,4295 February 20th 2024
It's spinning too fast!
When you need to grate or slice vegetables, you generally use an electric machine that does all the work: a food processor, a mixer with a "slicer" extension or similar. Are these machines really suitable? Generally speaking, yes of course, but there's one criterion that often poses a problem,...5,3185 November 12th 2023
Other pages you may also like
The taste of raw tomatoes
Let's take a look at tomatoes, which are still in full bloom at the end of summer (as I write these lines), and which make for delicious salads. I had already talked to you about the interest of peeling tomatoes, which gives them an extraordinary sweetness in the mouth, but let's talk about the...11K4.9 September 8th 2018
Egg yolks and caster sugar
We often come across recipes where we need to mix egg yolks with caster sugar. This would appear to be a very ordinary and simple thing to do but, be warned, these two ingredients can behave oddly together.72K 24.4 February 15th 2018
The bitterness of endives
As I write these lines, we are entering the endive season, and if you like it, it's time to enjoy it, if possible with your local producers. Endive is good, but the reproach that is often made of it, and children in particular, is: "It's bitter! And it is (somewhat) true of course, endives...8,7784.9 February 9th 2019
The window-pane test in bread-making
The home bread-makers often ask themselves “Have I kneaded my dough long enough?” . A good question, as dough that is insufficiently kneaded will not rise properly or will fall flat when the top is slashed, which is very frustrating. To know when the dough is ready, one can rely on the length...86K 23.9 June 16th 2021
What can I use for blind baking a pastry case?
When it comes to home-made desserts, tarts are always popular. They can be divided into two basic types: those cooked with their filling, such as an apricot and almond cream tart, and those where the filling is added after baking the pastry case, such as a strawberry tart or chocolate tart. For...104K4.5 May 2nd 2017
Follow this page
If you are interested in this page, you can "follow" it, by entering your email address here. You will then receive a notification immediately each time the page is modified or a new comment is added. Please note that you will need to confirm this following.
Note: We'll never share your e-mail address with anyone else.
Alternatively: you can subscribe to the mailing list of cooling-ez.com , you will receive a e-mail for each new recipe published on the site.