helpful tip with nutella: pour the dough into pans and swirl the nutella into the mixture. This helps prevent it from sinking to the bottom and sticking to the pan.
I had the same problem as LARavenscroft as all the Nutella sunk to the bottom, then stuck to the bottom of the pan when I tried to get it out of the pan :-/. It does taste delicious though. It's very moist. Thanks!
Made for And the Secret Ingredient is............ This wasn't very pretty when it came out of the pan and all of the Nutella sunk to the bottom, but oh, did it ever taste good. DH couldn't quit raving about it. I did convert this to gluten free by using 2/3 cup each of brown rice flour, cornstarch, and tapioca starch and adding 1 tsp xanthan gum. Not sure if that's what made the Nutella sink to the bottom or not. Anyway, I'll make this again. Thanks for posting this Boomette!