If you are talking QS desserts only, as I read the question to be, not snacks this is what I like.
MK Columbia Harbor House, the seasonal fruit cobbler has been tasty.
Mk, BOG, any of the desserts
HS Starring Rolls, the butterfinger cupcake
HS, Pizza Planet (now closed), the cappuccino cupcake
EP Sunshine Seasons, any of the desserts, especially the strawberry shortcake
EP Norway, school bread
AK Flametree, I know I am in the minority, but I like the key lime in the cup
I am not big on the traditional chocolate or carrot cake they have at many places.