Set up the grill for direct cooking over medium heat and oil the grates.
Slice the pound cake into 3/4-inch thick slices with a serrated knife.
Using car-shaped cookie cutters, cut out car shapes from the slices of cake. Brush with butter and place on the grill. Cook until nice grill marks appear, about 3 minutes.
Frost the car shaped cakes with a small amount of the coconut frosting.
Recipe courtesy of Sandra Lee