Halloween Oreo cookies made with a black cocoa cookie, Oreo cream cheese frosting, and a graveyard scene on top with cookie crumb dirt, a tombstone, and bone sprinkles.
In a stand mixer with a paddle attachment, beat butter, brown sugar, and granulated sugar until light and fluffy, about 2 to 3 minutes.
Beat in egg and vanilla until fully combined.
Add flour, black cocoa powder, cornstarch, baking powder, baking soda, and salt together.
Using a 1.5-tablespoon cookie scoop, add mounds of dough to a baking sheet lined with parchment paper or a baking mat. Chill for 1 hour.
Preheat oven to 400°F. Place the baking sheet directly from the fridge into the oven. Bake 10-12 minutes, until edges are set, but centers still look slightly underbaked. Cool on pan 5 minutes, then transfer to a wire rack.
Oreo Cream Cheese Frosting
Separate the filling and wafers from 8 Oreos. Add the cream filling to the mixing bowl.
Crush the Oreo cookie wafers in a food processor until fine crumbs. Set aside.
Beat butter and cream cheese with the Oreo filling until fluffy, 3-4 minutes. Add vanilla, then powdered sugar, Oreo crumbs, and salt. Beat until fluffy again.
Once cookies are fully cool, use a 1-tablespoon cookie scoop or a spoon to add a dollop of frosting to the top of each cookie.
Topping
Sprinkle crushed Oreo crumbs over frosting to look like dirt, pressing lightly. Press a tombstone and bone sprinkles into the crumbs while the frosting is still soft.