Do It With Icing
This place is located on Clairemont Mesa, so maybe 10 -15 minutes from Carmel Valley. But, if you are a good baker interested in learning more about pastry techniques, decorating, etc. this seems like a decent place to learn more.
http://www.doitwithicing.com/classroom/classroom.asp
Classes average cost are $40-45 and they seem to have a pretty robust schedule of choices. They have an online store of products as well and even some recipes that they share.

