Preheating-microwave-oven-for-cake, how to preheat an oven. before you bake something, your oven needs to be heated to the proper temperature. while it takes only a few seconds to turn on your oven, it can take several minutes for it to reach the right temperature. the act.... Here is a list of commonly asked queries for baking in the convection mode in microwave eg. can i bake in my m/w? wat baking utensil should i use for baking?