1-First, preheat your oven to 350 degrees Fahrenheit and line two baking sheets with parchment paper to keep things neat. This sets the stage for even baking and prevents sticking. In a large bowl, cream the softened butter, light brown sugar, and granulated white sugar using an electric mixer for two minutes until it’s light and fluffy that’s the secret to a great texture.

2-Next, add the two egg yolks, peppermint extract, and vanilla, then mix on medium speed for another two minutes until everything is pale and fluffy. This step ensures your cookies have that perfect rise and flavor. Now, combine the dry ingredients: add the flour, cocoa powder, baking powder, baking soda, and salt, mixing until just combined for a smooth dough.

3-Incorporate the peppermint chips and semi-sweet chocolate chips into the dough for those tasty bursts in every bite. Scoop the dough into 18 balls, spacing them two inches apart on your prepared baking sheets. Pair these cookies with a simple ice cream recipe for an extra treat after baking.

4-Baking and Cooling Tips: Bake for 10 to 12 minutes go for 10 if you like chewy centers or 12 for crispier edges. After baking, let them cool on the sheets for two minutes, then transfer to a rack for 10 minutes. If you want, sprinkle crushed candy canes on top for a festive finish. Proper flour measuring is crucial here, as weighing it out helps avoid dry results.