Remove the stems: we will only use the leaves. Set aside 20-25 leaves (this will be a decoration), chop the rest thoroughly with a blender or knife.
Prepare peppermint oil: thoroughly rub crushed mint into butter.
Add sugar and salt to the butter and grind the mixture until smooth.
Add both types of flour to the mixture and knead the dough.
Roll out the dough into a layer 5-7 mm thick (this is convenient to do between two sheets of baking paper).
Using a 5cm diameter round cutter, mark out the cookies to be made. Place one mint leaf in the center of each circle, сover the dough with leaves with parchment paper and use a rolling pin to. Place the dough in the refrigerator for half an hour.
Preheat the oven to 150 °C.
Cut out the cookies according to the markings and place on a baking sheet lined with baking paper.
Bake for about 25 minutes. Keep in mind: the cookies should not brown except around the edges.
The cookies will be very fragile straight out of the oven. Cool it a little and when it gets stronger, transfer it to an airtight box.