The oven is arguably our most essential kitchen appliance (right alongside the fridge, freezer, and yes, even the microwave). But even though we’ve been using them for a few millennia, many of us know so little about our ovens that our cooking or baking can feel like a roll of the dice sometimes.
Observe & Record
The first step is to observe all you can about your oven before you cook or bake a single thing more. Because no two ovens are the same, this advice is not a one-size-fits-all solution. Just like disaster plans for your household need to be tailored to the specifics of your home, so does getting to know your oven.
The first thing is to notice where your oven is located. We’re not talking feng shui here, but be aware of its location relative to other things that may cool it or cause the temperature to heat up more rapidly. A draft from an open window or doorway can subtly cool an oven. Notice its position next to other heated appliances like a refrigerator or the motor of an ice machine. Is your OTG oven in a corner, in the middle of counter space, or standing alone? The closer it is to other appliances or corners, the less space it has to cool off. These are all important things to note when budgeting time to preheat, cook, and eventually cool off.
Since you’ll be working with time, temperatures, and other numbers, it’s a good idea to write this or any other quirks you observe down. In the midst of preparing for a dinner party, you may not have all the details handy in your mind—plus, it’s handy to pass along that info to house guests or renters when necessary. A quick glance at your notes can be a lifesaver. There are lots of great notebook apps (my favorite is Evernote) to help with notes and recipes, but if you’re more of a handwritten note person, then keep a notepad (and pencil) on your fridge or nearby appliance. Mini-Whiteboard works, too.
Hot Air Rises, Cool Air Falls
If you take the time to look at an oven, its function becomes pretty self-evident: heat is generated around your food by heating elements from both above and below. A process called natural convection dictates that air, when heated, will rise because its molecules are loosened by the heat and are less dense. The molecules in colder air, by contrast, are packed in together more tightly and thus weigh more. It’s how a hot air balloon works! This happens at the smallest molecular level so even air that is different by a couple of degrees will rise and fall accordingly, creating a constant movement of air within your microwave oven.
Don’t Believe the Hype…or Thermometer!
Don’t be fooled by the manufacturers of your oven. Because of most safety gauges, like your gas tank gauge in your car, are designed to err on the side of caution, the internal thermometer may not be accurate. Slate has a great breakdown of why oven thermometers’ temperature readings are more of a general estimate. It turns out your oven generally falls within a range of temperatures rather than staying at one steady reading.
That’s why it’s worth knowing how close within the range your oven’s temperature is. So let’s say that you’ve set your oven to 450°F. Its heating element may just hit 450, which won’t get you to the full 450. Or it may go slightly above and then cool off to 450. The obvious solution? Buy a thermometer that you can put inside the oven to get a more accurate reading. You can compare the difference between what your oven’s built-in thermometer tells you and what the actual temperature on your inside thermometer says.
Don’t forget to write down the temperature variance in your oven and, moving forward, adjust your cooking temperatures accordingly. If, for example, your oven runs cooler by 25°F (the oven’s built-in thermometer tells you 475°F but your hanging thermometer actually reads 450°F) then set your oven to 475 for recipes that call for 450. And yes, the location of the thermometer does matter. Remember natural convection? Your oven has hot spots that may only be different by a few degrees but these degrees may affect your cook. More on that below.
Generally, heat is generated by your oven from above and below. The Reluctant Gourmet has an excellent primer on how that heating system works. The top part of your oven is hotter than the bottom part, if only by a matter of a few degrees. So if you want something quickly heated or are looking to create a crisp top layer, put your food on the top rack. If you’re looking to cook something more slowly or need a crunchy bottom (like a pizza), but the food on the bottom rack.
The middle rack should be for anything that needs to be cooked evenly all around. But as The Reluctant Gourmet points out, keep in mind the height of what you’re cooking and try to keep the middle of it directly in the middle. Items like four-inch Bundt cakes might do better on the bottom rack so that it’s centered and not made crispy by being placed on a higher rack. Racks can also be removed, but not while they’re hot…ouch! (If you absolutely have to move it when it’s hot, use an oven mitt or a pair of silicone-tipped tongs.)
Hot Spots in Conventional Ovens
Alright, here’s where we discuss hot spots. In a conventional oven (the type that most of us have), different areas of the oven will register different temperatures. If you’ve ever cooked a casserole or brownies and noticed different consistencies throughout the dish, then you are probably already aware of these spots in your oven.
Convection ovens have this problem to a lesser degree because they have a fan that circulates the hot air (in theory, this keeps the temperature relatively steady). But again, no oven is perfect and it’s best to figure out how off if at all, your oven is.
One easy way to figure out about these hot spots in a cheap and easy fashion is to use white bread.
Ovens can get messy, and that’s a good thing! The splatters and crackles of a meal are all part of the cooking experience. But of course, once that oven cools so does anything that’s on those walls. That buildup, according to cookbook author and teacher Rick Rodgers, will flavor your food in “not a good way.” The coordinator for Kansas State’s food hotline, Karen Blakeslee, goes even further by saying that your crusty buildup can damage the appliance and make it run inefficiently.
So cleaning your oven is an important, if not sexy, part of cooking. There are a couple of ways to tackle this. One is to get a self-cleaning oven. When self-cleaning ovens came out in the 50s, they were hailed as a modern marvel for mothers who wouldn’t have time to get in there and clean all the caked-on food. How the ovens “self-cleaned” is not a mystery. They basically crank up to about 900 degrees and singe the material so that it falls off the walls and is easily collected at the bottom. Yuck.
Self-cleaning ovens usually have locks and are insulated more heavily to allow the higher temperatures to collect. Besides being a huge waste of energy, the process creates noxious fumes from all the burnt material. And repairmen are called infrequently because the self-cleaning feature either damages the oven itself or the area around it. You can also use chemical cleaners that are found in any store, but the EPA points out that the main ingredient in these cleaners is lye, which is corrosive and can be harmful to little children.
Fortunately, you can clean your oven cheaply and in a way that’s environmentally friendly with just baking soda and water. Vinegar will activate the baking soda effectively. (That’s what my wife and I use in our home because we don’t want our toddler to eat baked chemicals!) Check out the two videos below for further instructions.
Convection vs. Conventional Ovens
Finally, a word on convection ovens. These ovens use a fan to circulate the air within the oven. Kitchen Daily notes that convection ovens will heat up faster, shaving minutes off your cooking time. But they also note that cookware with higher sides will negate the effects of the convection within the oven. Recipes are generally written with traditional oven settings, so you’ll have to adjust for the quick cook time when using a convection oven.
About the only benefit to convection ovens is that they may keep the temperature steadier than conventional ovens and prevent hot spots. But unless you need an enveloping sear for a roast, convection ovens don’t do much else. And the costs of a convection oven are significantly higher than a traditional oven. Master your conventional oven and you’ll get the benefits of best OTG oven without shelling out the extra money.