01 - In a mixing bowl, beat together powdered sugar, unsalted butter, peppermint extract, heavy cream, and salt until a smooth, pliable dough forms. Add more powdered sugar gradually if mixture is too sticky.
02 - Scoop out portions of dough, about 2 teaspoons each, and flatten into 1/4-inch thick round discs. Arrange on a parchment-lined baking sheet.
03 - Freeze the formed discs for 20 to 30 minutes until fully firm.
04 - In a heatproof bowl set over simmering water, melt chopped dark chocolate and coconut oil (if using), stirring until mixture is smooth and fluid.
05 - Using a fork, dip each chilled peppermint disc into the melted chocolate, ensuring full coverage and letting excess chocolate drip off. Return coated patties to the parchment-lined baking sheet.
06 - Chill the chocolate-coated patties in the refrigerator for 15 minutes or until the chocolate is firm and completely set.