ChocoBosto Cream Pie

We all know John is a bit finicky with what he eats (health-nut), so when the man lets me know he likes something (bad for him) I do my best to remake it into something he will actually eat (not so bad for him). I've had this discussion with you before... but the man loves boston cream pie, personally I can't understand it, that creamy white filling creeps me out something fierce!
Today is actually the little health nuts birthday! Happy Birthday John!! I didn't make this for today but don't you worry he got something even better (you'll have to wait to see it).
Choco-Bosto Cream Pie
recipe by ::steph chows:: with some help marked below
Cake:
1 cup unsweetened apple sauce
1/2 cup white sugar (I used splenda)
2 Tbs brown sugar
1 tsp vanilla extract
1 egg
3/4 cup whole wheat flour
1/3 cup Hershey's 100% Cocoa Special Dark
2 tsp Baking powder
1 tsp baking soda
dash salt
1/8 tsp cinnamon
Preheat over to 350 F
Mix apple sauce, sugar (and/or) splenda, vanilla, beat in egg
In a separate bowl mix flour, cocoa, baking powder, baking soda, salt, cinnamon.
Add flour mixture to wet mixture a little at a time. Spoon batter into greased 8" spring form pan
Bake for about 25-30 minutes or until tester comes out clean. Set aside and let cool completely.
Filling:
Direct from CookingLight
Icing (I'm not sure where I wrote this down from... but I'd probably use something different next time, this one was ok though)
1/3 cup chocolate chips
2 Tbs canola oil
1 cup powdered sugar
Place chips and oil in a heavy bottom pan, stir and cook over medium heat until melted, remove from heat and stir in sugar.
Assembly/Toppings
With a sharp long knife cut your cake in half (this is the hard part) place on a nice plate and then slather on all the filling, top with other cake half and then drizzle chocolate frosting over top. Toss on some toasted hazelnuts for some flair... or anything else you have laying around.. sprinkles... bacon.. you know, whatever you've got :)