01 - In a mixing bowl, combine the powdered sugar, softened butter, peppermint extract, heavy cream, and salt. Beat with an electric mixer or sturdy spatula until the mixture forms a smooth, pliable dough. If dough is too sticky, gradually add additional powdered sugar until it is workable.
02 - Scoop out portions using approximately 2 teaspoons of dough per piece and shape each into a ball. Flatten balls into discs about 1/4-inch thick, then transfer onto a baking sheet lined with parchment paper.
03 - Place the baking sheet in the freezer for 20 to 30 minutes or until the discs are thoroughly firm.
04 - While discs chill, melt the chopped dark chocolate and coconut oil, if desired, in a heatproof bowl set over a pot of gently simmering water. Stir until smooth and fully melted.
05 - Using a fork, dip each firm peppermint disc into the melted chocolate, ensuring full coverage. Allow excess chocolate to drip off before placing back onto the parchment-lined baking sheet.
06 - Refrigerate the coated patties for 15 minutes or until the chocolate sets completely.