Purple Sweet Potato Cake

Pink Birthday CakeOne would think that if you roast purple sweet potatoes until soft and tender, blend them into a silky smooth puree and bake them in a cake, that said cake would emerge from the oven a delightful violet color, or maybe a purply pink.  But one would be wrong.

In fact, while the cake batter went into the oven purple, the baked cakes emerged a bizarre green color.  I'm no scientist, but I'm guessing there was some sort of oxidation effect during the baking process that was to blame...