Preheat oven to 350°F and line a muffin pan with 9 cupcake liners.
In a medium bowl, whisk together the flour, cocoa powder, baking powder, baking soda, and salt.
In a large bowl, whisk together the eggs, granulated sugar, brown sugar, oil, buttermilk, and vanilla extract. Add the dry ingredients to your large bowl and stir until just combined.
Add in 1/2 of the crushed Oreo's to the batter and stir to combine.
Fill your cupcake liners with the batter, about 3/4 of the way full. Top each cupcake with some of the reserved Oreo's.
If you have any empty muffin wells, fill half way with water so the cupcakes will bake evenly.
Bake for 15-18 minutes or until a toothpick comes out clean.
Allow the cupcakes to cool for 5 minutes before removing from the muffin pan and transferring to a cooling rack. Cool cupcakes completely before frosting.