Line a cookie sheet with parchment paper and side aside

1. In the bowl of a stand mixer with the paddle attachment, cream together sweetened condensed milk, 5 cups powdered sugar, and peppermint oil, and mix until smooth. The dough should be the consistency of playdough. Add up to 1/2 cup more powdered sugar, one tablespoon at a time, if needed, until that consistency is reached.
2. Place dough on the prepared cookie sheet. Use powdered sugar to help prevent the dough from sticking and roll the dough out to 1/4 inch thick.
3. Place in the refrigerator until dough is very firm, about 1 hour.
4. Using a 1-inch round cookie cutter, cut dough into rounds. Cover, and place back into the freezer for 30 minutes up to 24 hours.
5. Meanwhile, add chocolate chips and coconut oil to a microwave-safe bowl and microwave in 15-second increments, stirring between, until the chocolate is melted.
6. Working in batches, keep most of the patties in the freezer and remove about 6-10 at a time, cover the patties in chocolate and place them on parchment paper.
7. They are ready to eat when the chocolate is set!