In a small saucepan, melt the butter, peanut butter, coconut oil, and coconut butter over medium-low heat.
Add the stevia and cocoa powder and mix thoroughly.
When it's well combined, pour into candy molds or ice cube trays. Place the candies in the freezer so they can set up.
Once set up, you can eat them right away. I pop the candies out of the molds and store them in a ziplock bag in the freezer. These candies rarely last more than 24 hours in my house!
Notes
Need a dairy free option? In place of the butter use 1/4 cup more peanut butter and 1/4 cup more coconut butter. They'll still turn out lovely!