After the zombie apocalypse, there will still be cake

Best thing I have heard recently that I now have to try: before there was baking powder, there was deer horn. That's right, antlers, ground fine, can be used as a leavener in the same ratio as you would use baking powder. Similarly to baker's ammonia, it is stinky on baking, but the smell disappears when cool. And, bonus, like baker's ammonia it actually results in a better texture.

Now who's got an antler they can send me?