Before shaving the ice, place 3 Oreo cookies into a sandwich sized Ziplock bag and use a rolling pin to crush them. You may also you a food processor on the lowest speed setting. To begin, shave 5 ounces of ice into your desired cup or bowl. Next, pour 2 ounces of Vanilla syrup and 1 ounce of sweetened condensed milk onto the ice. Sprinkle this layer with 1/2 of your crushed cookie crumbs. Then, shave the remaining 5 ounces of ice onto your already flavored concoction. Finishing, top with the remaining 2 ounces of vanilla syrup, 1 ounce of sweetened condensed milk, and the other 1/2 of your crushed Oreo cookies. Serve with a spoon or a spoon-straw.