1. Grease an ice-cube tray with nonstick spray.
2. Put the chocolate and coconut oil in a microwave-safe bowl. Microwave for 30 seconds at a time, stirring in between until the chocolate has melted and is smooth.
3. Fill about a third of the ice-cube tray with melted chocolate. Allow to cool for 2-3 minutes. Tilt and rotate the tray to ensure the chocolate coats all the sides.