Add yeast to lukewarm water and 1 teaspoon of sugar. Let stand for 5 minutes.
Add salt, shortening, and remaining sugar to hot scalded milk and cool to lukewarm.
Add softened yeast and 3 cups of flour. Beat well.
Add enough flour to make a soft dough.
Place the remaining flour on the board, turn out dough on floured board and knead until smooth and elastic.
Place in a greased bowl, turn over, so that greased side is on top, cover with a cloth and let rise until doubled in bulk.
Punch down and let rise a second time if desired.
Cut dough into halves, round into balls, cover, and let stand for 10 minutes.
Shape into loaves and place in greased bread pans. Grease tops, cover with a cloth, and let rise until doubled in bulk.
Bake in a hot oven (400°F.) for 10 minutes, reduce the temperature to 350 °F. and bake 30 to 35 minutes longer.