In a large bowl, beat together egg yolks and sugar. Beat in vanilla extract, butter and salt. Alternately mix in flour and milk until blended well.
In a separate bowl, beat egg whites until they have formed soft peaks. Fold egg whites into batter and let stand for 40 minutes.
Spray preheated waffle iron with non-stick cooking spray. Pour mix onto hot waffle iron. Cook until golden brown and fluffy.
Source: Read Full Article