For a twist on an oatmeal stout, substitute some of the 1lb of flaked oats with some packets of Quaker Maple 'n' Brown Sugar Oatmeal. Each packet contains approximately 1.625oz of oatmeal and sugar/flavoring. Adjust as desired for a total of 1lb of oats.
Steep the oats @ 115F for 15 minutes.
Steep rest of grains @ 155F for 45 minutes.
Bring to a boil, then remove from heat and slowly add the DME until dissolved.
Top off water for preboil volume of 6 gallons.
Bring back to a boil.
Boil for 60 minutes, adding hops as indicated, and add some whirlfloc or other fining at end of boil if you want to. This will end up dark, so finings aren't really necessary.