How about 2-ingredient baked goods - this was posted last year (on Recipes I think) by Frostqt
Almost Gingerbread
1 box spice cake mix
1 small can (the regular size can) of pumpkin (not pumpkin pie mix)
Mix together. Grease a 9 x 13 pan, bake at 350º for 27 minutes
To me it is a cross between gingerbread and pumpkin bread. Dense texture but pretty good for 2 ingredients!
can also be used for muffins (DorothyR's Super Easy Pumpkin Muffins) - add 1 tsp of pumpkin pie spice to the above. Line 12 regular-size muffin tins with paper liners (cups will be full; don't worry, won't overflow), bake at 350º for 18-22 minutes.