Preheat oven to 350°. Mix package cake mix according to directions. (Do not bake.)

Line cupcake tins with liner, place an oreo cookie in the bottom of each one.

Take 1/2 of remaining cookies and chop coarsely and add to cake mix. Fill the cupcake tins. Bake for 15 min (or according to box directions). While cupcakes are baking make the frosting.

Cream together butter and cream cheese. Add vanilla, then add powdered sugar slowly until blended well.

Chop remaining regular-sized oreo very fine. Add to frosting.

After cupcakes are cool put frosting on and decorate with a few mini oreos on top.