Preheat the oven to 350°F. Line a muffin tin with liners and set aside. Whisk together all purpose flour, unsweetened cocoa powder, baking powder, baking soda and salt in a medium mixing bowl. Set aside.
1 cup all-purpose flour, ⅓ cup unsweetened cocoa powder, 1 teaspoon baking powder, ½ teaspoon baking soda, ¼ teaspoon fine sea salt
In a separate large mixing bowl or the bowl of a stand mixer, combine the granulated sugar and vegetable oil and mix until combined.
1 cup granulated sugar, ⅓ cup vegetable oil
Add the eggs, one at a time, beating well after each addition.
2 large eggs
Add half of the flour mixture to the wet ingredients, followed by the whole milk and vanilla extract. Stir in the remaining flour mixture just until combined.
¾ cup whole milk, 1 ½ teaspoons vanilla extract
Gently fold in the coarsely chopped Oreos.
10 OREO cookies
Use an ice cream scoop or large spoon to fill the liners about ⅔ full. Bake cupcakes for 18 to 20 minutes or until an inserted toothpick comes out clean or with a few moist crumbs.
Allow the cupcakes to cool for 5 minutes before transferring to a wire rack to cool completely before frosting.