If using an electric mixer, switch to the dough hook at this point and begin to slowly incorporate the remaining 3 1/2 cups of flour. If not using an electric mixer keep mixing in the flour gradually until a soft dough forms that leaves the sides of the bowl. (Note: You may need to use a little more flour. Depends on the time of year and humidity sometimes. If you have a to add another 1/2 cup or so, don't worry. Add only enough flour to form a dough that releases from the sides of the bowl and remains slightly tacky but able to be handled with your bare hands.)