Donut-Glazed Yeasted Waffles

INGREDIENTS

1 1/2 cups

milk milk, lukewarm (approximately 95-105ºF)

package (2 1/4 teaspoons) active dry yeast

2 1/2 cups

all purpose flour (preferably bleached*)

1 tsp

kosher salt

1 tsp

granulated sugar

1/2 cup

unsalted butter, melted and slightly cooled

large eggs, separated

1/2 tsp

baking soda

1/4 cup

unsalted butter, cut into cubes

2 tbsp

whole milk

1 cup

powdered sugar, sifted

seeds of 1/2 a vanilla bean or 1/2 teaspoon vanilla bean paste or extract