Steps
1. In a microwave-safe bowl, combine the butter and dark chocolate.
2. Microwave in 20-second intervals, stirring in between, until melted and smooth.
3. Stir in the milk, powdered sugar, and sea salt until well combined.
4. Pour the mixture into a silicone muffin mold or cupcake liners, filling each about halfway.
5. Place in the refrigerator for 30 minutes or until set.
6. Once set, carefully remove from the mold and enjoy your decadent treat!