I'm just getting started making soap. My first is going to be a melt and pour project. I have 2 lbs of shea butter melt and pour soap base. Ok how much fragrance do I need to add to it without creating a disaster? Also, I'm going to use the monkeys farts fragrance for my kids and would really like for it to be brown and have a chocolatey smell added. Can I use regular cocoa for this and if so, how much should I use?