Preheat oven to 350°F and line 2 baking sheets with parchment paper.
Roughly chop the Oreos into small pieces and set aside.
In the bowl of a standing mixer with the paddle attachment or using a hand mixer, beat peanut butter and butter together until smooth.
Add in the granulated and brown sugars and beat until light and fluffy, then mix in the egg and vanilla extract.
Add the flour, salt, and baking soda into the bowl and mix until just combined. Stir in the chopped Oreos. It is important not to over-mix the dough!
Use a large cookie scoop or your hands to form 3 tbsp-sized balls of dough and bake one tray at a time for 8-10 minutes. The middles will look soft and the edges should look slightly golden brown.
Remove the cookies from the oven and use a butter knife or large biscuit cutter to shape the cookies into perfect circles. Let the cookies cool on a baking sheet for 15 minutes then transfer to a cooling rack to cool completely.
Notes
PLEASE NOTE: I highly recommend using a kitchen scale to weigh your dry ingredients. Metric measurements are found above, under the "Metric" tab.PEANUT BUTTER: I recommend the regular Skippy or Kraft-type peanut butters for this recipe. Natural peanut butter will change the texture and structure of the cookies, making them slightly crunchier and they will spread more. Storage Instructions: These cookies should be stored in an airtight container at room temperature and will stay fresh for up to 5 days.