Here we go again, what's new this time?  I figured I won't have much time to I made the mushrooms ahead of time.  When it was time to serve I just stuck the mushrooms on and voila!

Recipe for cake is here.

For the mushrooms:

You're going to need:
-2 egg whites
-100g granulated sugar
-2 tbs powdered sugar
 -cocoa powder

*Whip the egg whites until soft peaks, gradually add the granulated sugar and whip to stiff peaks, fold in the powdered sugar.  Pipe the mushrooms onto a baking sheet.  The stems and caps are piped separately, of course.  Dust the tops with some cocoa powder and bake at 200'f for about 45 mins to an hour. 

To assemble the mushrooms; "glue" the stems to the caps with frosting, melted chocolate, glucose, melted sugar...pretty whatever you have on hand and is sticky.