Add milk and butter to a large microwave safe bowl (or pot on the stove) and warm until butter has melted. Allow to cool until lukewarm.

Add flour, salt, sugar and yeast to a mixing bowl and stir to combine. Gradually whisk in milk mixture.

Cover bowl and refrigerate batter overnight (6 to 24 hours).

Preheat waffle iron. Separate egg yolks and whites. Mix the yolks, baking soda and vanilla and add to batter. Beat the whites until stiff peaks, then fold into the batter.

Spoon batter into greased waffle iron. Cook until golden and crisp.

Serve waffles immediately or keep warm in a 200-degree oven until ready to serve.

Serve with homemade syrup, whipped cream, and fresh berries