Pre heat oven to 350 and line cookie sheet with parchment paper.

In a medium bowl whisk together flour, cocoa, baking powder, baking soda and salt. Set aside.

In the bowl of stand mixer (or using a hand mixer) combine the butter and sugar. Beat on medium high speed until light and fluffy 2-3 minutes. Add the egg and peppermint extract. Beat until well combined. Scraping down the sides of the bowl as needed.

With the mixer on low, slowly add the flour mixture and stir until just incorporated. Stir in the chocolate chips.

Scoop a heaping tablespoon or use a cookie scoop. Roll into a ball. Slightly flatten the ball and press the top of the dough add more chocolate chips if you want. Place on prepared cookie sheet 1 1/2 inches apart.

Bake 10-12 minutes, until edges are firm and the center is still soft. Let cool on the cookie sheet 5-10 minutes then transfer to wire rack to cool completely.