I almost don't want to write a review for Sophia's because I'm afraid it will evolve past its awesome current neighborhood hole in the wall. But I can't help it - it's too good to be kept a secret. The pastries are amazing, the pies even better (if you call ahead, they'll set aside a few of their individual-sized pie/tarts for you). Strawberry-rhubarb are ridiculously good, as are peach-blackberry and probably just about everything else. Breakfast/brunch foods are also great, just the right mix between super-fresh ingredients and a little grease for your Sunday morning. The omelettes and savory crepes are especially great, although every once in awhile I'm partial to the Belgian waffle with fresh fruit.
Sophia's is only open Saturdays and Sundays since they spend the rest of their time supplying other Madison eateries with their goodies, so to get the real deal right out of their ovens, hit it on a weekend - the earlier the better since they do get busy!