Medium-high heat, or high heat. If it's medium heat it's too slow. Generally light wave combination function, if you use the light wave function alone can also be, so it is slower. Combination function keys include "microwave", combination cooking means microwave and light wave together. The microwave function is faster. How long to bake depends on the amount of food you have. With the cake is a reason, to five cookies: high heat 1 minutes 30S (800w), and then turn over Medium heat for about 1 minute.