I have a pumpkin cake recipe I make for potlucks that's always a big hit. Will post recipe when my kid is no longer sleeping on top of me ;)
ETA ... Forgot I had it on the iPad ...
1 can pumpkin pie filling mix (not solid pack pumpkin)
1 yellow cake mix with pudding in the mix
2 sticks melted BUTTER, cooled slightly
1 can evaporated milk
3/4 cup sugar
3 eggs
1 cup chopped nuts (I like pecans, some like walnuts)
Cinnamon, to taste
Cool Whip
Line a 9x13 pan with waxed paper, overlapping all 4 edges of the pan. Mix together, pumpkin pie filling mix, evaporated milk, sugar, eggs, and cinnamon to taste. Pour into pan gently so it doesn't flow under the waxed paper. Sprinkle cake mix and then nuts on top of pumpkin mix. Pour butter over everything. Bake at 350 degrees for 45-60 minutes. Let cool. Invert cake onto a serving platter and frost with cool whip. Store refrigerated.
Now, I don't usually do the lining and inverting thing, unless I really want it to look pretty. I usually just bake it and then serve it like cobbler with the cool whip on the side for this who want it.