Ingredients:
- For the cookies:
- 4 ounces butter, softened
- 1/2 cup granulated sugar
- 1 egg
- 1/4 cup cocoa powder
- 1 cup all-purpose flour
- For the filling and the coating:
- 1 1/2 cups powdered sugar
- 1/2 teaspoon peppermint extract
- 4 ounces milk chocolate
- 2 ounces dark chocolate
- 1 tablespoon coconut oil, or vegetable oil