Preheat oven to 350 degrees. In a medium mixing bowl, whisk together the flour, cocoa powder, sugars, baking powder, baking soda, and salt. Add the oil, milk, coffee or water and just barely whisk to loosen things up. Add the eggs and whisk until smooth. Line muffin tins with 24 paper liners and divide the batter evenly into the tins. Bake for 18-20 minutes, until a toothpick inserted in the center of a cupcake comes out clean. Cool completely before frosting.

To make the frosting, beat the cream cheese, butter, powdered sugar, and salt until light and fluffy. Add the Oreo crumbs and beat to combine. Pipe or spread liberally onto cooled cupcakes.