For baking, heat needs to come from the bottom of the cooking space, not the top, though many people swear by fan-assisted baking (aka a convection oven), which makes the heat come evenly from all sides, including top and bottom. You need to adjust baking times if you have a fan-assisted oven.
Can you use both racks in oven?
Yes, you can! Make sure to check the wings occasionally to see if the pans need to be switched to ensure even cooking. One of the racks may get hotter than the other. You can also make sure that both of the pans are placed as close to the center of the oven as possible by adjusting the rack positions.
“The oven floor provides the hottest, most even and direct heat possible,” explains Carolynn, “which means you can get your vegetables nice and caramelized without overcooking them.”
Does it take longer to cook 2 things in the oven?
Can you cook 2 or more dishes in the oven at once? Yes. … The dishes will typically take 15 percent longer to cook than if only one is cooking, so adjust the time accordingly. To ensure even cooking, make sure the oven is fully preheated before inserting dishes, and rotate the dishes halfway through.
Baked chicken breast
Place the breast skin-side up, on top of a cooking rack placed inside a roasting pan (like this baking sheet and rack set). Using a cooking rack allows air to circulate around the chicken. Cook for 5 to 7 minutes, then turn the heat down to 350 degrees.
Most have dual heating sources: one at the base of the oven and one at the top. Because hot air rises, the top of the oven tends to be consistently hotter. However, the lower heating element heats in bursts so it may swing hotter, then cooler as you cook.