Add chocolate, peanut butter, cream, coconut oil, and vanilla extract to double boiler, not allowing water to touch bowl. When chocolate is melted, whisk together until smooth.
Add sweeteners and salt to taste. We prefer our chocolate on the dark side, so you may need to add more sweetener for your palate. Transfer ganache to a lidded container and refrigerate at least 4 hours, and up to a week ahead.
Put powdered peanut butter in shallow dish. Scoop small portions of ganache, roll with hands to shape, and then roll in powdered peanut butter. Enjoy!
Fat bombs will keep in the refrigerator for up to a month, if you have that kind of will power.
Notes
The last paragraph of my blog post gives ideas for substitutions based on your dietary needs, including vegan and paleo diets as well as peanut allergies. Also, while these will store best (longest) in the fridge, due to their high fat content they can be quite hard straight from the chill. They taste best when brought to room temperature before eating.