01 - In a mixing bowl, combine powdered sugar, softened butter, peppermint extract, heavy cream, and a pinch of salt. Beat with an electric mixer or sturdy spatula until a smooth, pliable dough forms. If dough is too sticky, incorporate additional powdered sugar gradually until it is workable.
02 - Portion dough into small balls, about 2 teaspoons each, and flatten them into 1/4-inch thick discs. Arrange discs on a baking sheet lined with parchment paper and freeze for 20 to 30 minutes until firm.
03 - Place the chopped dark chocolate and coconut oil, if using, in a heatproof bowl set over a pot of simmering water. Stir gently until fully melted and smooth.
04 - Using a fork, dip each chilled peppermint disc into the melted chocolate, ensuring even coverage. Allow any excess chocolate to drip off, then return discs to the parchment-lined baking sheet.
05 - Chill the coated patties in the refrigerator for 15 minutes or until chocolate is completely set.