2. With the mixer at medium speed, beat in eggs, sugar, and salt into yeast mixture until combined. With mixer on low speed add 4 cups flour, beating until combined. Add butter, 1 tablespoon at a time, beating until combined. Transfer dough to a large bowl, and stir in 4 cups flour with a spatula or wooden spoon until combined. (This is a large amount of dough, so you may need to transfer to a large mixing bowl to accomplish this).