Splicing.

You can cut off the inner part of the 14-inch cake embryo and wrap it around the outer layer of the cake. The cake will look bigger and become 16 inches.

How to make the cake embryo: Beat the eggs in an oil-free and water-free basin. Add the flour, milk, and blended oil to the egg yolks and mix well. Add the sugar to the egg whites in three batches and beat well.