Measuring the baking ingredients by weight is absolutely necessary so make sure to use a proper scale.
The measurements and whipping time for the batter are critical to make a sponge cake. If they are not accurate, the sponge cake will become flat.
Let the cake cool down in the cake pan as it will keep the sponge cake moist.
We recommend using the real whipping cream with no additives. It is rich-flavored and far more tastier than non-dairy alternatives.
The baking time depends on various factors for example the size of round pan and the type of oven you use. We recommend keeping your eyes on the cake while baking.
If the height of sponge cake is not enough, you might want to bake another sponge cake so that your Christmas cake will have 3 or 4 layers.