Line 2- 12 cup muffin tins with paper liners. Preheat the oven to 350.
Stir together the dry cake mix with the dry pudding mix in the bowl of an electric mixer. Stir in the eggs, oil, water, and sour cream. Fold in the 1-1/2 cups of crushed Oreo cookies.
Fill your cupcake liners 2/3 full with batter. Bake 12-15 minutes or until a toothpick comes out clean.
Cook completely.
For the frosting:
Place the softened butter in the bowl of an electric mixer. Add the powdered sugar 1 cup at a time keeping your mixer on low speed.
Stir in the vanilla and heavy cream.
Beat 2 minutes or until fluffy.
Fold in the crushed cookies and pipe onto your cupcakes.