Preheat your oven to 350°F (175°C).
In a large mixing bowl, cream together the softened butter and powdered sugar until light and fluffy.
Add the peppermint extract and mix until combined.
In a separate bowl, whisk together the flour and salt.
Gradually add the flour mixture to the butter mixture, mixing until just combined.
Fold in the mini chocolate chips.
Form the dough into tablespoon-sized balls and place them on a baking sheet lined with parchment paper.
Bake for 10-12 minutes or until the edges begin to golden.
Let the cookies cool on the baking sheet for 5 minutes before transferring to a wire rack.
Once cooled, roll each cookie in powdered sugar to coat them.