Fruit filled Crumble bars
I usually use strawberry or raspberry preserves, but they will work with any kind....
Have added peanut butter (crunchy kind melted for 30 seconds in the microwave) to the cake mix & oatmeal mixture along with the butter, then used grape & raspberry preserves and made peanut butter and jelly bars.... Yummy as well.
Thinking of for fall time, adding cinnamon or pumpkin pie spice to crumb mixture and trying with apple pie filling, or apple butter.... haven't tried that yet but will. will post a coment when I do saying yes it worked or not it didn't.... :)
Also you can easily double this recipe using the whole cake mix, adding more butter and using more preserves pressing it into a 13 x 9 cake pan.