I am going to be brewing up Heritics Shallow Grave Porter clone this weekend... It has a late aroma hop addition for the last 15 minutes of the boil. I was curious as to why it recommends the addition at the last 15 minutes, rather then flameout? I was under the impression that you get better hop aroma at flameout, even beyond flameout, say cooling down the wort to 180 and then steeping the hops..
Should I just be following the recipe with the hop addition?