Fold egg white mixture into yolk mixture alternately with dry ingredients, making 3 additions of egg whites and 2 of dry ingredients. (styleathome.com)
Scraping between additions of eggs really does help the mixture combine evenly for a smoother, more delicious finished product. (pillsbury.com)
If the addition of another egg white causes your batter to be too runny, add another 1/4 cup or so of confectioners» sugar). (deliciouslyyum.com)