In large mixer bowl, mix 2 cups flour, sugar, salt and yeast.
Heat milk, water and 1/2 cup butter over low heat to 120°-130° F
Add to dry ingredients and beat on medium speed 2 minutes.
Add eggs and 3/4 cup flour and beat 2 more minutes on high.
Add enough (about 5 cups) flour to make a stiff dough. Knead 4-5 minutes.
Place in greased bowl; turn to grease top. Cover with cloth and let rise in warm place for 35 minutes.
Divide into thirds. Roll each into 14" by 9" rectangles.
Mix sugar and cinnamon.
Brush rectangle with melted butter and sprinkle with 1/3 of the cinnamon sugar mixture. Roll up and place into greased bread pans, 9" by 5" by 3" inches.
Let rise 35 minutes.
Bake at 375° for about 35 minutes. Brush tops with butter and sprinkle extra cinnamon sugar. Great toasted for breakfast!