01 - In a mixing bowl, combine powdered sugar, unsalted butter, peppermint extract, heavy cream, and salt. Mix with an electric mixer or sturdy spatula until a smooth, pliable dough forms. If too sticky, gradually incorporate additional powdered sugar until dough is workable.
02 - Portion dough into small balls using about 2 teaspoons per piece. Flatten each ball to a 1/4-inch thick disc and arrange evenly on a parchment-lined baking sheet.
03 - Place baking sheet in freezer and chill patties for 20 to 30 minutes until firm.
04 - Set a heatproof bowl over a pot of simmering water and melt dark chocolate with coconut oil, stirring continuously until chocolate is smooth and glossy.
05 - Remove patties from freezer. Using a fork, dip each disc into the melted chocolate, allowing excess to drip back into the bowl. Replace coated patties on parchment-lined sheet.
06 - Refrigerate the chocolate-coated patties for 15 minutes or until set and firm.