These Oreo cupcakes are a fun and delicious dessert that is perfect for birthdays or special occasions. They are made with a moist chocolate cupcake batter and topped with Oreo buttercream frosting. To make the cupcakes, you will need all-purpose flour, sugar, cocoa powder, baking powder, salt, milk, vegetable oil, eggs, vanilla extract, and Oreo cookies. Mix the dry ingredients together, then add the wet ingredients and mix until smooth. Fold in the crushed Oreo cookies and pour the batter into cupcake liners. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean. To make the frosting, mix butter, powdered sugar, vanilla extract, and crushed Oreo cookies until smooth. Pipe the frosting onto the cooled cupcakes and top with additional crushed Oreo cookies.