Put the cocoa butter, coconut oil, honey, and cocoa powder in your blender. (I used my VitaMix.)Heat the coconut milk in the microwave until it's very hot but not boiling, about 45 seconds.Pour the hot milk over the other ingredients in the blender.Start on low and gradually increase the speed until the cocoa butter is fully melted and the fondue is smooth. Scrape down the blender if necessary.Taste and add stevia if desired. Mix to combine.Fondue will thicken as it cools. To speed up the process, put the fondue in the refrigerator.