01 - In a mixing bowl, combine powdered sugar, softened butter, peppermint extract, heavy cream, and salt. Beat until a smooth, pliable dough forms. If dough appears sticky, incorporate additional powdered sugar incrementally until it becomes workable.
02 - Portion dough into small balls, approximately 2 teaspoons each, and flatten into 1/4-inch thick discs. Arrange discs on a parchment-lined baking sheet and freeze for 20 to 30 minutes until firm.
03 - In a heatproof bowl placed over a pot of simmering water, melt chopped dark chocolate with coconut oil if using, stirring frequently until completely smooth.
04 - Using a fork, dip each chilled peppermint disc into the melted chocolate, allowing excess chocolate to drip off. Return coated patties to the parchment-lined baking sheet.
05 - Refrigerate patties for 15 minutes or until chocolate coating is fully set.