In a double boiler or microwave, melt the unsweetened chocolate and butter together. Stir until smooth and well combined.
Add the powdered Erythritol, dark rum, almond flour, shredded coconut (if using), vanilla extract, and a pinch of salt. Mix thoroughly until a firm dough forms.
Form the dough into small bite-sized balls and place them on a baking paper-lined tray.
In separate small bowls, prepare the garnishes - cocoa powder, powdered sweetener, and shredded coconut.
Roll each ball in the desired garnish until fully coated.
Refrigerate the rum balls for at least 1-2 hours or until firm.
Serve and enjoy these delightful keto-friendly rum balls!