This was a no brainer when I first saw it posted. I think the version I saw used a different fruit filling but anything goes here.
What you need:
2 (21oz) cans of fruit filling (or the equivalent)
1 box of white (or yellow) cake mix
1 stick of butter (melted)
Crock Pot (in case that wasn't obvious)
Grease the crock pot. I used a bit of the melted butter and wiped it with a paper towel.
Dump in both cans of filling.
Top the filling with the dry cake mix and completely cover filling.
Drizzle melted butter on top of that.