In a large mixing bowl combine 1 1/2 cups of the flour and yeast; set aside. In a medium saucepan heat and stir milk, the 1/3 cup sugar, the 1/4 cup butter, and salt just until warm (120 to 130 degrees F.) and butter almost melts. Add milk mixture to dry mixture along with eggs. Beat with an electric mixer using dough hook on low to medium speed 30 seconds, scraping bowl. Beat on high speed 3 minutes. Using a wooden spoon, stir in as much of the remaining flour as you can.