The amazing 7 oz chocolate-chip cookie or peanut butter cookie with also a lot of good bread. The place to try is you want some sweet bites. It is so good that they also provide pastries and other stuff for almost 25 other businesses in Pittsburgh (such as the Grocery store in Walnut Street, the Coffee Commonplace in Squirrel Hill, etc.). If you lived in Pittsburgh since a while, there is a high probability you already ate one of their pastries.
So, either if you are here since a long time or just for a few days, pass by and give a try.