Some days, when you think you've seen it all, you stumble across an egg filled with a brownie. It happens. But, can you believe it? This cool idea comes from a Spanish food blogger and the recipe is surprisingly simple. The key to using egg shells is to make a small hole in the bottom of the egg and remove the yolk and egg white through the hold. This is a crucial step in making Ukranian-style dyed eggs, and there are a few tools available specifically for the process. One the egg is hollow, it's prime for recipes like this one!