Byrdy Cake - A healthy alternative to traditional chocolate cake

Matt's mother made a fabulous chocolate cake this weekend.  Not the least bit sponge-y..full with thick chocolate goodness.  So of course I called her for the recipe and made a version appropriate for this (now) healthy home.  I was shocked at how great it tasted when I was done.  I use all non-fat, sugar free, naturals - with the exception of the starting mix.  I promise this one will be a hit!  Well, here it is...straight from the Byrdy test kitchen, moments ago.

• 1 box Devils Chocolate food cake mix (dry mix)
• 1 small box Fat-free, Sugar-free Instant Chocolate Pudding (dry mix)
• 1 1/3 Cups Unsweetened Apple Sauce (this replaces using eggs)
• 1 Cup Fat-Free Sour Cream
• 1/2 Cup Extra Virgin Olive Oil
• 1/2 Cup water
• (optional - I did not use this in the healthier version) grate 2 small blocks of semi-sweet baking chocolate into batter. 

Spray a 9x13 glass dish and sprinkle with whole wheat flour to lightly coat.  Spread batter evenly in dish.  Bake at 350 for 35-40 min.