Well - there are always cookies and brownies with some candy corn decorations on them or fall colored sprinkles.
Autumn cutouts - using a leaf cutter and using various colors for the frosting. Apple cutouts.
Caramel or candied apples are definitely fall - not just Halloween.
You can make little "sacks" of various candies using different colored netting and ribbons to tie.
Add some fall colored M & M's to your favorite chocolate chip or sugar cookies, etc.
And don't forget cupcakes with fall colors, sprinkles, etc.