Beat egg yolks and sugar in a bowl until light. Add cooled, melted butter, milk, and vanilla. Add flour, baking powder and salt. Beat well. Beat egg whites until stiff and gently fold into batter.

Before the first waffle, spray with pam. Ladle just enough batter to fill the lower grid so that the peak areas of the grid are covered. If necessary, use a spatula to spread the batter into the corners of the grid. Close the waffler. Do not open the waffler for at least 1½ minutes.

Remove and flip upside down to cool. Top with fresh fruit and whipped cream, if desired.