Preheat oven to 350°F and line 2 baking sheets with parchment paper.
Measure out your Oreo crumbs, or make your own by finely chopping 6 Oreo cookies, or placing them in the food processor or blender until crumbs form. You can also add the Oreos to a ziploc bag and roll over them with a roll pin until you have fine crumbs. Roughly chop the remaining 6 Oreo cookies and set aside.
In the bowl of a standing mixer with the paddle attachment or a handheld mixer, mix butter and sugars until light in color and fluffy (1-2 minutes)
Add in the egg and vanilla extract, and beat until just combined.
Mix in the dry ingredients until a dough forms. Add in the chocolate chips,Oreo crumbs, and crushed Oreos and mix until just combined.
Use a medium cookie scoop or spoon to make 1.5-2 tablespoon sized balls and place them on the baking sheet around 3-4 inches apart. Stick a few more pieces of Oreo and chocolate chips on top if desired.
Bake the cookies one sheet at a time for 8-11 minutes. Remove them from the oven when the edges look set. They will look under-baked in the middle!
Leave the cookies on the baking sheet for 5 minutes, then transfer to a cooling rack to cool completely. Enjoy!
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Notes
Please Note: I highly recommend using a kitchen scale to weigh your dry ingredients. Metric measurements are found above, under the "Metric" tab.Measuring Flour:Be sure to properly measure your flour using either a kitchen scale or by fluffing it up in the bag with a fork, then using a spoon to scoop the flour into the measuring cup and then use the back of a butterknife to level it off (the is the scoop and level method)Oreo Crumbs: You can use store bought Oreo crumbs, or you can crush up 6 Oreos into fine crumbs.Gluten Free Variation: To make these cookies gluten free, use gluten free Oreos and replace all purpose flour with gluten free all purpose 1-1 baking flour.Storage and Freezing: Store the cookies in an airtight container at room temperature for up to 4-5 days. You can also freeze the cookie dough balls for up to 3 months, you’ll need to give them an extra minute or two in the oven though! You can also freeze the baked cookies, then defrost them overnight in the fridge before baking.