In a stand mixer bowl, combine one can of sweetened condensed milk, a tablespoon of peppermint extract, and half a teaspoon of vanilla extract. Mix on low until blended and smooth.

Gradually add powdered sugar, mixing on low speed until a soft dough forms.

Lightly sprinkle a clean surface with powdered sugar and knead the dough gently until smooth.

Roll the dough to about ½-inch thickness, adding more powdered sugar as needed.

Cut out 1 to 1½-inch circles from the dough and freeze for 15 minutes.

Melt dark chocolate in a microwave-safe bowl in 30-second increments until smooth.

Dip each frozen patty into the melted chocolate, coating thoroughly.

Refrigerate the decorated patties for about 20 minutes to set the chocolate.