Jeannie's Cakes are available in stores throughout Winnipeg and for some inexplicable reason are staggeringly popular in that city. It's just not a real birthday or celebration unless you serve a Jeannie's Cake. They are essentially a simple white or chocolate sheet cake with some icing on top. They taste like cardboard, especially the white cakes. But Winnipeggers can't get enough of them. I blame it on the mosquito fogging that the City does every summer. Those chemicals must do something to taste buds.
(Incidentally, the above photo is not actually a Jeannie's Cake. It's simply the closest approximation I could find on teh interwebs.)