I think I've lost count of the ongoing tally between the Alliance and Horde cakes over here at WoW Insider, although I can say for certain that I've never actually eaten a WoW-themed cake (bummer!). Reader Steve tipped us in to a cake that doesn't side with either the Horde or Alliance, but features the two continents of Kalimdor and the Eastern Kingdoms (Northrend didn't make the cut, apparently).
While a map and faux faded parchment colors probably don't help make a visually appetizing cake -- the lower right of the cake is actually the Naga depicted on the world maps, don't worry about the green -- this literally sweet gesture was made by WoW widow girlfriend Natalie for her man Sean's 21st birthday. Sean plays on the Bronze Dragonflight EU and held a party for his guildies in May Contain Funk where this edible Azeroth was unveiled. According to Steve, the cake was vanilla sponge with raspberry jam and was, "absolutely delicious". Since those guys didn't send us a slice, we'll just have to take his word for it!
[UPDATE: Reader Alex3 sent in a picture of his friend Woo's birthday cake made by Woo's awesome mom -- a Warlock icon cake that looks delightfully, infernally scrumptious! Man, I'm hungry now. Check out the gallery for all the awesome Warcraft-themed cakes we've seen over here at WoW Insider.]
Gallery: World of WarCrafts: WoW-themed cakes