In a stand mixer fitted with the paddle attachment, thoroughly combine the flour and salt so the salt doesn’t touch the yeast. Add the eggs, yeast, sugar, and water. Beat the dough for about 8 minutes on medium speed. At first, the dough will adhere to the sides of the bowl and form strings between the paddle and the walls of the bowl. Continue beating until the dough pulls away from the sides and clings to the paddle attachment. Use a rubber spatula to scrape the inside of the bowl so all the dough gets incorporated. Add the butter and continue beating for 3 to 5 minutes, until the butter disappears.