Very rich and surprisingly moist for being so low in fat. I cut the recipe in half and baked it in a 8" round pan. It really rose quite high! I used Hershey's Special Dark cocoa powder for an even richer flavor. Not sure what the lime juice is for, since it isn't tasted, but maybe it adds some acid to the mix? I used whole wheat pastry flour for a lighter texture. I added 1/4 cup chopped hazelnuts also. Served with a dollop of nonfat, no sugar added vanilla yogurt. Made for Spring 2010 PAC.