01 - In a medium bowl, beat together powdered sugar, softened butter, heavy cream, peppermint extract, and salt until smooth and pliable. Add additional powdered sugar if mixture is too sticky.
02 - Roll mixture into 24 small balls, about one teaspoon each, then flatten slightly into discs. Arrange on a parchment-lined baking sheet.
03 - Place discs in the freezer for 20 minutes until firm.
04 - Melt dark chocolate and coconut oil (if using) in a heatproof bowl set over simmering water, stirring until smooth. Remove from heat.
05 - Using a fork, dip each peppermint disc into melted chocolate, tap off excess, and place back on parchment-lined sheet.
06 - Refrigerate coated chocolates for at least 20 minutes until set.
07 - Keep chocolates in an airtight container refrigerated for up to 2 weeks.