Whoopie Pies

I've known about whoopie pies for a long time, but you don't see them too often.  Though I just saw an article in SF Gate that says they are making big inroads on the West coast.

These are two round cookies, but very cakelike, with cream in the middle:

I've never tried making them, but the recipes in the article don't sound too hard. 

May give it a try.