A friend of mine asked me to make a tractor cake for her dad;s birthday. She wanted a green tractor and a grassy field, and here is what she got. The cake is a 10-inch round, dark chocolate chip with buttercream frosting and filling. All decorates are done in buttercream. The tractor was done using the frozen buttercream transfer method. My only real problem was the light spots that appeared after the buttercream thawed. I only left it in the freezer for 30 minutes, so I am not sure why this happened. The only thing I can figure is it has something to do with the salt in the buttercream. This was my first attempt at FBT, though, so overall I was pretty happy with it.