Dissolve yeast in 1/2 cup water for 5 minutes in a large mixing bowl until the yeast begins to bloom. Do not use hot water, this will kill the yeast.
In the same bowl, with bread hook mix together yeast mixture and remaining water, sugar, salt, and butter along with up to 6 cups of flour. Continue to mix on medium speed adding additional flour slowly until the dough is easy to handle.
Turn dough out onto a lightly floured surface and knead dough until smooth and elastic, adding a little flour as needed to prevent sticking.
Place dough in a lightly buttered bowl turning to coat. Cover with a clean dry towel and place in a warm place to rise until doubled in size about 1.5 hours.
Once doubled in size, punch down dough and divide in half. Roll each half into a rectangle and roll up beginning at the short side. Place seam side down in the greased loaf pans.
Cover with clean dry cloth and let rise until doubled again, about 1.5 hours.
Preheat oven to 425 degrees.
Once doubled in size bake at 425 degrees F for 30 to 35 minutes until golden brown. If the top browns too much lightly cover with a piece of aluminum foil during the last 15 minutes of baking.