So I've never actually been to the Flying Apron, but I had their pastries at the Eliott Bay Cafe. They were fantastic!
I got one of their brochures, which lists all the available items they make. Most are vegan and gluten-free, for those with allergies. They offer individual pastries, as well as whole cakes and pies. Special orders for birthdays, weddings, etc., are also possible.