I personally have a hard time finding these things:
-From scratch GOOD homemade regular pound cake! My husband however loves lemon pound cake, so I make it with lemon zest/juice inside the mix and a lemon glaze on top.
-BROOKIES! Brownie cookie hybrid.
-HOMEMADE CHEESECAKE! I haven't had one in years and the lady that made them was great at it. Haven't had a tasty cheesecake since. Alternately, I love the Japanese cotton cheesecake.
-Sugar cookies with royal icing designs to match the seasons!
-Homemade fudge was always a hit at the state fair I noticed.
-I haven't had a good Pineapple Upside Down Cake since I was a toddler and my Grandma made it from scratch.
Edit: Also, I really love coffee cakes and zucchini or banana bread!
Hope these may help? I know they are alot but you could sell by the slice on cakes.

These are all things I'd pay to eat