01 - Beat powdered sugar, unsalted butter, heavy cream, peppermint extract, and sea salt in a mixing bowl until a smooth, thick dough forms. Add more powdered sugar if mixture is sticky.
02 - Divide dough into 24 equal portions. Roll each into a ball, then flatten into a disk approximately 1/4 inch thick. Arrange on a parchment-lined baking sheet.
03 - Place shaped patties in the freezer for 20 to 30 minutes until firm.
04 - Melt dark chocolate and coconut oil (if using) over simmering water or in 20-second microwave intervals, stirring until smooth.
05 - Dip each frozen patty into melted chocolate using a fork, allowing excess chocolate to drip off. Return to the parchment-lined baking sheet.
06 - Refrigerate coated patties for at least 15 minutes until the chocolate is set.
07 - Store peppermint patties in an airtight container in the refrigerator for up to 2 weeks.