01 - In a mixing bowl, beat together powdered sugar, unsalted butter, peppermint extract, heavy cream, and a pinch of salt until the mixture forms a smooth, pliable dough. Add more powdered sugar if needed to achieve a workable consistency.
02 - Scoop out small portions, about 2 teaspoons each, and shape into balls. Flatten each ball into a 1/4-inch thick disc and arrange them on a parchment-lined baking sheet.
03 - Place the baking sheet in the freezer for 20 to 30 minutes until the discs are firm.
04 - In a heatproof bowl over a pot of simmering water, melt the dark chocolate and coconut oil if using. Stir until completely smooth.
05 - Using a fork, submerge each peppermint disc in the melted chocolate, letting excess drip off. Return each coated disc to the parchment-lined sheet.
06 - Refrigerate the coated patties for 15 minutes or until the chocolate is fully set.