Maangchi's rolls

Ingredients (for 6 rolls) Serves 3 to 4
3 tablespoons butter
½ cup cold milk
2 tablespoons sugar
¼ teaspoon salt
1 large egg
2 teaspoons dry yeast
1 ½ cups plus ¼ cup all purpose flour
1 egg white
Directions
Heat the butter in a large heavy pot. Turn off the heat.
Add the milk, sugar, and salt. Mix well with a wooden spoon until thoroughly dissolved.
Crack the egg, add to the mixture and mix well. Add the dry yeast and let it all sit for 1 minute.
Add 1 ½ cups flour and mix well with the wooden spoon (or rice scoop) for about 1 minute. The dough will be very sticky.