Disney Cars/Lightning McQueen birthday cake This is a Costco cake decorated (by their bakery) with chocolate icing and a red border only. The track is made from oreo crumbs with an M&M border. The sand is made from graham cracker crumbs. I bought green pre-made frosting with a piping tip from the grocery store to make the grass. I designed a sign and attached it with wooden skewers to hold the birthday banner. Super easy cake!