Preheat the oven to 350F then line a baking sheet with parchement paper and set aside.
In a food processor, grind the 10 Oreos until finely crushed. In a medium bowl, mix the crushed Oreos, flour, corn starch, cocoa powder, baking soda, baking powder, and salt then set aside.
10 oreo cookies, 1 & ¼ cup flour, 1 tablespoon corn starch, ¼ cup black cocoa, ½ teaspoon baking soda, ¼ teaspoon baking powder, ¼ teaspoon salt
In a stand mixer bowl, cream the softened butter, brown sugar, and granulated sugar until light and creamy.
½ cup butter, ¼ cup granulated sugar, ½ cup brown sugar
Add in the egg and the vanilla and mix again until combined. Scrape the bowl when needed.
1 large egg, 1 teaspoon vanilla extract
Add in the dry mixture and mix until the dry mixture disappears. Then using a large cookie scoop( about ¼ cup scoop), scoop out 8 equally sized cookie dough balls, flatten to about 1 inch in thickness, and bake in the preheated oven for 10 minutes
As soon as the cookies come out of the oven make an indentation in the center using a ⅓ cup measuring cup to give the cookies the shape of a pie crust. Allow them to cool down fully.