My DD7 has done this program 4 or 5 times. She loves it and will be taking her 4 yo cousin in October. They have about 2 dozen different foods they make. We've had the worms and dirt, English muffin pizzas, fruit tarts (twice--and they are the best), and some sort of cake. So, I guess she's done it 5 times.
If memory serves me correctly, it is held on Tuesday and Friday from 10am-11:45am, although they have always started and ended a little late when we've done it. It's a 90-day PS and they do fill up pretty fast now, although there are cancellations, probably because you have to prepay. It used to be about $15, which I thought was the greatest bargain on property. After all, you bet an apron and toque, 2 hours of babysitting, a cooking class, food--I still think it's a good deal at $25.
It is a great time. I would say that the majority of the kids are in the 6-8 age range, but in our limited experience it's more rare to see a 4 year old than a 10yo. I think your daughter will have a blast--it's a great program!!!! Enjoy!