01 - In a mixing bowl, combine powdered sugar, softened butter, peppermint extract, heavy cream, and salt. Beat until the mixture becomes a smooth, pliable dough. If dough appears too sticky, incorporate additional powdered sugar incrementally until easy to handle.
02 - Scoop approximately 2 teaspoons of the dough, roll into balls, and flatten each to about 1/4-inch thickness to form discs. Arrange on a baking sheet lined with parchment paper.
03 - Transfer the tray to the freezer and chill the discs for 20 to 30 minutes, or until firm.
04 - Combine dark chocolate and coconut oil (if using) in a heatproof bowl set over barely simmering water. Stir frequently until fully melted and glossy.
05 - Dip each chilled peppermint disc into the melted chocolate using a fork, allowing any excess chocolate to drip off before returning to the parchment-lined sheet.
06 - Refrigerate the chocolate-coated patties for 15 minutes, or until the coating is firm and fully set.