01 - Beat together the powdered sugar, softened butter, peppermint extract, heavy cream, and salt in a mixing bowl until a smooth, pliable dough forms. Add extra powdered sugar if the mixture is too sticky.
02 - Portion dough into 2-teaspoon sized balls and flatten to 1/4-inch thick discs. Arrange on a parchment-lined baking sheet. Freeze for 20–30 minutes until firm.
03 - Combine 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 - Dip each chilled peppermint disc into melted chocolate using a fork, letting excess chocolate drip off. Return coated patties to the parchment-lined sheet.
05 - Refrigerate patties for 15 minutes, or until chocolate is fully set and glossy.