Bake cupcakes according to package directions. Remove from cupcake tins and place on a wire rack to cool.
Remove the cream from one row of Oreo cookies. Place cookies in a food chopper and pulse till finely chopped into crumbs. You can also put them in a plastic bag and smash them. Set crumbs aside.
Remove cream from at least six Vienna Fingers (depending on how good you are at breaking them in half). Break cookies in half to make 24 headstones. Set on a plate or piece of wax paper.
Place 2 spoonfuls of chocolate frosting in the Ziploc bag. Cut a tiny hole at the end and squeeze frosting down toward it. Pipe the letters RIP on the front of each cookie headstone.
Frost each cupcake with chocolate frosting using a butter knife. Press a cookie headstone into each cupcake and sprinkle with Oreo cookie crumbs to form a grave. Or sprinkle all over with Oreo cookie crumbs, depending on the look you want.
Press a Mellowcreme Pumpkin onto each cupcake next to the headstone. Serve and enjoy!