01 -
Preheat your oven to 400°F (200°C). Line two baking sheets with parchment paper to prevent sticking and ensure even baking.
02 -
In a large mixer, combine the cold butter pieces, brown sugar, and granulated sugar. Beat on medium-high speed for 3-4 minutes until the mixture becomes creamy and light in texture.
03 -
Incorporate the eggs and vanilla extract into the creamed mixture. Beat until well combined, scraping down the sides and bottom of the bowl to ensure even mixing.
04 -
Gradually add the flour, cornstarch, baking soda, and salt to the wet mixture. Mix on low speed just until combined and a dough forms. Avoid overmixing to prevent tough cookies.
05 -
Gently fold in the crushed Oreos, Andes peppermint pieces, and chocolate chips by hand until evenly distributed throughout the dough.
06 -
Cover the dough and refrigerate for at least 2 hours. This prevents excessive spreading during baking and allows the flavors to develop fully.
07 -
Using a 1/4 cup cookie scoop, portion the chilled dough onto the prepared baking sheets, spacing them about 2 inches apart. Bake for 10-12 minutes until edges are golden brown but centers remain soft.
08 -
Allow cookies to cool on the baking sheets for 5 minutes before transferring to a wire rack to cool completely. Enjoy when still slightly warm for the best texture.