01 - In a mixing bowl, combine powdered sugar, unsalted butter, peppermint extract, heavy cream, and salt. Beat until a smooth, pliable mixture forms. If too sticky, incorporate extra powdered sugar until workable.
02 - Scoop 2 teaspoons of dough, roll into balls, and flatten into 1/4-inch thick discs. Arrange on a parchment-lined baking sheet.
03 - Freeze discs for 20 to 30 minutes until they are firm.
04 - Place chopped dark chocolate and coconut oil, if using, in a heatproof bowl set over simmering water. Stir until melted and smooth.
05 - Using a fork, dip each chilled peppermint disc in melted chocolate, allowing excess to drip off. Transfer back to parchment-lined sheet.
06 - Refrigerate coated patties for 15 minutes or until chocolate sets.