01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the gluten-free flour, cocoa powder, baking soda, and salt until well blended.
03 - In a large bowl, beat the softened butter with brown sugar and granulated sugar until light and fluffy, approximately 2-3 minutes.
04 - Beat in the eggs one at a time, then add vanilla extract and peppermint extract. Mix until thoroughly combined.
05 - Gradually add the dry ingredients to the wet mixture, mixing on low speed until just incorporated. Do not overmix.
06 - Gently fold in the semisweet chocolate chips and mint chocolate chips until evenly distributed throughout the dough.
07 - Drop tablespoon-sized portions of dough onto the prepared baking sheets, spacing them approximately 2 inches apart to allow for spreading.
08 - Bake for 9-11 minutes, or until the edges are set but the centers remain slightly soft. Avoid overbaking for optimal chewiness.
09 - Let the cookies cool on the baking sheet for 5 minutes to set, then transfer to a wire rack to cool completely.