This Oreo milkshake is a refreshing and indulgent treat that is perfect for hot summer days. It is made with vanilla ice cream, milk, and Oreo cookies. To make the milkshake, you will need vanilla ice cream, milk, and Oreo cookies. Blend the ice cream, milk, and Oreo cookies together until smooth. Pour the milkshake into a glass and top with whipped cream and additional crushed Oreo cookies, if desired.