Stuck Imperial Porter

Update- Kegged this a few days ago and waiting for it to carb up. I was very pleased that I was able to save this brew by adding some additional brown sugar once it got stuck. I believe it was the very high mash temp along with a high % of less than fermentable grains that did me in along with directly sprinkling the dry yeast into the fermenter. Probably a combination of all these things. Anyway, it tasted really good before carbonation so hoping for the best once carbed up. Thanks to everyone who replied.

 

The additional sugar brought it up to 1.093 and once that was fermented off it came down to a final gravity of 1.032. Higher than I would have liked but tasty and not a dumper. Final ABV of 8%. I'm letting it mellow out in the keg and it is tasting pretty good. I patterned it off of Denny's Bourbon Imp Porter but without the bourbon. I get a lot of chocolate and a touch of coffee, just the balance I like.