Chop the chocolate into small pieces and the mint leaves roughly into large pieces. Mix all the ingredients marked ＊ and set aside.
Bring the butter to room temperature, add the granulated sugar and salt, and mix well until the mixture turns white.
Mix the egg and milk, divide into 3 batches, add to the stirred butter and mix it all together.
Add the ＊ ingredients to the bowl and mix in. Then add the chocolate and mint leaves and mix it all together.
Divide the dough into 3 sticks, then wrap each and let rest in the freezer for 1.5 hours until they have chilled and hardened.
Sprinkle granulated sugar, cut into 7 mm cookies and bake for 13-15 minutes in a 175°C (340°F) oven.
Transfer to a rack, and when they are cooled, they are done.
Story Behind this Recipe
When I gave these cookies to my neighbors, they loved it, so I uploaded the recipe here. My daughter loves these.
The mint aroma is better if the leaves are fairly large. Once you've formed the dough into a stick and wrapped it, you can store it in the freezer. The mint leaves will still be refreshing when you defrost it.