Cook cake-mix according to cupcake directions on the back of the box. Let them cool completely.

Frost the cooled cupcakes with a decorating bag and tip.

Carefully remove one side of the Oreo cookies, exposing the frosting. If cookie crumbs are present on the frosting, use a sharp knife to carefully scrape a thin layer off of the frosting, removing the crumbs with it.

Using a food safe marker or pen, draw a clock face onto the frosting of the Oreo cookies. Place cookie clocks on top of frosted cupcakes.

Finish off the cupcakes with colorful sprinkles.