DO NOT USE COCOA BEAN MULCH IN YOUR YARD!!!!
It is dangerous to dogs if they eat it. And, since it smells lovely, many dogs do, indeed, eat it. Even if you don't have a dog, your neighbor might. Yeah, it's your neighbor's responsibility to keep their dog on their property, but that's a whole other blog post now, isn't it? LOL
Here's a link with more detailed information about Cocoa Mulch.