01 - In a mixing bowl, beat the powdered sugar, unsalted butter, peppermint extract, heavy cream, and salt until a smooth, pliable dough forms. If too sticky, gradually add more powdered sugar until the dough is workable.
02 - Scoop approximately 2 teaspoons of dough per serving, rolling into balls and flattening each to 1/4-inch thick discs. Arrange on a parchment-lined baking sheet.
03 - Transfer the discs to the freezer and chill for 20 to 30 minutes, or until firm.
04 - Melt the chopped dark chocolate and coconut oil, if using, in a heatproof bowl set over simmering water. Stir until the mixture is completely smooth.
05 - Using a fork, dip each chilled peppermint disc into the melted chocolate, allowing excess coating to drip off. Place coated discs back on the parchment-lined sheet.
06 - Refrigerate the patties for at least 15 minutes, or until the chocolate is firm.