La Gourmandine offers by far the best, most luscious cake that you can buy in Pittsburgh and the surrounding areas.
One of my friends gets these for all her parties and their wonders make me ecstatic every time.
Runners Up
According to both my own pastry-loving tastes and the inherited wisdom of my life-long Pittsburgher mother and aunts, the runners-up options for "best cake in Pittsburgh" are both more "old-fashioned and sugary" than La Gourmadine: Prantl's Burnt Almond Torte or the strawberry-layer cake from The Oakmont Bakery.