This Recipe is meant for Boy Scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

Apple pie filling
1 box yellow cake mix
1/2 can 7-Up
1 Tbsp. cinnamon

dessert

Any combination of flavors that sound good to you can be tried. This example is apple, yellow cake, and cinnamon. Another might be cherry filling, chocolate cake, and powdered sugar. Or, blueberry filling, white cake, and grape soda.

Line the dutch oven with aluminum foil to make clean up easier if you aren't adverse to doing that.
Pour the fruit filing into the bottom of the D.O.
Sprinkle the cake mix on top of the filing - do not stir it.
Pour the soda on top of the mix from a low height so it does not splatter all over.
With a fork, mix the soda into the cake mix, being careful not to mix it into the filling too much - a little is ok.
When the cake mix is stirred, sprinkle cinnamon on top.
Cook for 45 minutes at 325 degrees.