It is important to note that every microwave is different.  Newer microwaves will require less cook time than older ones.  Keep an eye on your bowl each time it goes into the microwave to ensure that it doesn’t over cook (you don’t want it to turn too golden brown) or overflow.  I have been lucky with these cook times but have read a bunch of reviews from people who had to try the recipe a couple of times before they got the timing right.