I made this Mack Truck cake for a 3rd birthday party. I used the frozen buttercream transfer method to make the Mack image. It is a simple method that always produces great results. I heard about that method on this site and learned how to do it on YouTube.
I use a small piece of plexi-glass rather then a cookie sheet so I can check my image from the bottom while I work on it. I wrote the words "Mack" and "Rust.eze" after applying the image to the cake. When I was first asked to do this cake I was terrified that it would be too hard - I am happy with the results though.