What is the New Zealand white sponge cake, is it a white cake here in the U.S?
The New Zealand Edmonds cook book has a sponge cake recipe something like this. It's the only cook book we are allowed to use :-)

Ingredients


3 eggs, separated
3/4 cup caster sugar
3/4 cup Edmonds Fielder's cornflour
1 tablespoon Edmonds plain baking flour
1 teaspoon Edmonds baking powder
2 teaspoons golden syrup
1 tablespoon boiling water


Method


Beat egg whites until stiff
Beat in sugar then yolks
Sift cornflour, flour and baking powder into egg mixture
Add golden syrup dissolved in boiling water and mix gently with a metal spoon
Pour into two greased and lined 20 cm sandwich tins
Bake at 190°C for 20 minutes or until cake springs back when lightly touched
Leave in tin for 5 minutes before turning out onto a cooling rack