In 2000, some manufacturers began offering high power quartz halogen bulbs to their convection microwave models,[37] marketing them under names such as "Speedcook", "Advantium", "Lightwave" and "Optimawave" to emphasize their ability to cook food rapidly and with good browning. The bulbs heat the food's surface with infrared (IR) radiation, browning surfaces as in a conventional oven. The food browns while also being heated by the microwave radiation and heated through conduction through contact with heated air. The IR energy which is delivered to the outer surface of food by the lamps is sufficient to initiate browning caramelization in foods primarily made up of carbohydrates and Maillard reactions in foods primarily made up of protein. These reactions in food produce a texture and taste similar to that typically expected of conventional oven cooking rather than the bland boiled and steamed taste that microwave-only cooking tends to create.
Next, we tried defrosting a 1-pound portion of frozen ground beef in each microwave, using the automatic defrost setting on the models that had this feature. Some units gave prompts to flip the meat, which we did. When the time was up, we broke apart each block of meat with a fork to see if it was completely defrosted. None of the microwaves were particularly great at this task. Every model at least slightly cooked the edges of the ground beef we attempted to defrost. (Best practice is to slowly thaw meat in the fridge, or relatively quickly under cold running water.)
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Frozen dinners, pies, and microwave popcorn bags often contain a susceptor made from thin aluminium film in the packaging or included on a small paper tray. The metal film absorbs microwave energy efficiently and consequently becomes extremely hot and radiates in the infrared, concentrating the heating of oil for popcorn or even browning surfaces of frozen foods. Heating packages or trays containing susceptors are designed for a single use and are then discarded as waste.
Updates writer Eleanor Ford has used a secondhand Toshiba EM925A5A-BS for about seven months now. Even with the previous life of this microwave, our pick has lived up to its reputation. “It’s never failed to do what I expect a microwave to do, heats evenly, doesn't scorch, and is significantly more quiet than any other microwave I’ve used (including my parents’),” Eleanor said. They also noted that the small size allows the microwave to sit on a shelf rather than take up valuable counter space. Eleanor also said that the only notable downside is that they find it difficult to locate the kitchen timer button.
You’ve probably heard of a convection oven, but did you know that there are convection microwaves, too? These specialty appliances use the same technology as their oven counterparts: A fan blows and circulates hot air into the microwave, helping to cook food faster and more evenly. Convection microwaves can also brown or crisp food, similar to a traditional oven. 
Microwave ovens are frequently used for reheating leftover food, and bacterial contamination may not be repressed if the safe temperature is not reached, resulting in foodborne illness, as with all inadequate reheating methods. While microwaves can destroy bacteria as well as conventional ovens, they do not cook as evenly, leading to an increased risk that parts of the food will not reach recommended temperatures.[72]
Microwave ovens are a common kitchen appliance and are popular for reheating previously cooked foods and cooking a variety of foods. They are also useful for rapid heating of otherwise slowly prepared foodstuffs, which can easily burn or turn lumpy when cooked in conventional pans, such as hot butter, fats, chocolate or porridge. Unlike conventional ovens, microwave ovens usually do not directly brown or caramelize food, since they rarely attain the necessary temperatures to produce Maillard reactions. Exceptions occur in rare cases where the oven is used to heat frying-oil and other very oily items (such as bacon), which attain far higher temperatures than that of boiling water.