Weigh out ingredients
You'll need all-purpose flour, cocoa powder, baking powder, salt, sugar, brown sugar, oil, eggs, peppermint extract, and powdered sugar.
Make the dough
Whisk together the dry ingredients. In a separate bowl, combine the sugars, oil, eggs, and peppermint extract. Fold the wet ingredients into the dry until just combined. Chill the dough overnight.
Coat in Powdered Sugar
Using a 1 tablespoon cookie scoop, scoop the cookie dough and roll in the powdered sugar to coat.
Bake the cookies for about 10 minutes at 350 degrees F until puffed up and cracked. Allow the cookies to cool completely on the baking sheet.