The buttermilk old fashioned donut today is brought to you this morning by Do-Rite Donuts. They are located on 50 W. Randolph St. and 233 E. Eerie St. downtown Chicago. They serve donuts just like the buttermilk old fashioned Monday thru Friday between 6:30 am until 2:00 pm. Come early though, they close early if they sell out!