Which statement correctly describes the method for assembling layer cakes?

The method for assembling layer cakes focuses on achieving a smooth and even application of icing. Pushing the icing as you spread it allows for better control and even distribution over the cake layers. This technique helps to create a nice, clean edge and ensures that the icing adheres well, avoiding clumps or uneven patches.

In contrast, other methods may result in an undesirable finish. For example, dragging the icing can lead to pulling away parts of the cake or creating streaks. Similarly, while lifting off excess icing can be useful, if not done properly, it might disturb the existing icing or the cake layers, complicating the process. Finally, applying icing only on the top layer neglects the sides and overall appearance of the cake. Proper assembly involves icing both the top and the sides for a finished look, enhancing the cake's aesthetic appeal.