A combination microwave convection oven is a kitchen appliance that combines the even cooking of convection with the speed of microwaving. A regular microwave oven uses radio waves to heat foods quickly and easily in just minutes. A convection oven uses a heating element to quickly bake or brown foods. A combination microwave convection oven has the ability to do both types of cooking.
When a convection and microwave oven are combined in one appliance, the food is cooked simultaneously by microwave energy and by a flow of heated air. This gives you the benefit of fast cooking via the microwave while giving the food a brown outer coloring, along with other features. A convection oven can crisp the surface of some foods by first drying their surface via the circulation of hot air in the cooking process.
Browning foods is beneficial when you are baking or roasting, as it gives the food a look of being done. Convection ovens use a fan to circulate hot air to cook and brown the food. This helps keep meats moist by sealing in the juices via a fast-cooking method.
Because microwave and convection ovens cook food so fast, there is no need to preheat the food before putting it in the oven. In fact, frozen foods can even been defrosted by the microwave action of the oven.
Microwave ovens require the use of special, microwave-safe cookware. Convection ovens do not require such cookware. However, special elements can be added to effect different cooking results. Bright aluminum or light-colored cookware are best to use in convection ovens. A specially shaped roasting rack is needed to roast meats and poultry.
Convection ovens are usually more expensive than standard microwave ovens because of their added features. Therefore, you can expect that a combination microwave convection oven will be an relatively expensive kitchen appliance.