The Oreos are coated in vanilla frosting with a little Oreo cookie dust sprinkled in. The dirt is Oreo cookies ground up along with white sugar and brown sugar. I will work on the grass next time I will have much thicker frosting and a smaller tip. I tried to use fork tines to lift up some blades of grass. But not bad for the first attempt I think. Once I get this perfected will be a nice snack for our Music & the Mind Event: Stone Stories Summer Adventure Camp scheduled in mid July. Maybe I will get a few little characters and cars to go off roading through this imaginative dessert.