Preheat your oven to 350°F (175°C) and line a muffin tin with cupcake liners.
In a large bowl, whisk together the flour, granulated sugar, brown sugar, cocoa powder, baking powder, baking soda, and salt.
In another bowl, mix the vegetable oil, buttermilk, vanilla extract, and eggs until well combined.
Gradually add the wet ingredients to the dry ingredients, mixing until just combined. Fold in the crushed Oreo cookies.
Fill the cupcake liners about ⅔ full with the batter.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean. Let cool completely before frosting.