oatmeal stout issue

So i brewed a five gallon batch of an oatmeal stout from a recipe i made. After a few weeks in the keg i decided to finally taste it. The taste and aroma was spot on and awesome, just what i was looking to get. the only issue i had with it was the lack of body. The stout was just too "thin/watery". What could have caused this in my oatmeal stout? Also what can i do differently next time so i can get that thick rich creamy body found in oatmeal stouts? Thanks guys for your help and input!

Heres the grain bill:
7.5# 2 row
.5# C-80
.75# C-120
.75# Chocolate
.25# roasted barley
1.25# flaked oats

I mashed at 150 F for 60 min and used WLP 002 yeast.

 

Is it fully carbonated? I wouldn't pass judgement until it is. I'm not a big oat fan since it can add head-reducing oils to the wort. A bit of flaked barley is a big head and body builder.

 

I would say that it is. Ive had set to the correct psi for about 2 weeks and when i pour i get a pretty good head that holds for a while.

Ill def have to try the flaked barley next time seen if that helps!

 

Your grist looks good for building body. I suppose the mash temp may be too low to give you what you are looking for. Also, have you calibrated/checked your thermometer? It's possible that your mash temp may be even lower than you think.

 

Well the thermometer shouldnt be an issue since it is a thermaworks therma K and it comes calibrated already. Maybe it was the low mash temp. Thanks for you input!

 

I'll agree that the mash temp may be part of the problem as I would have mashed at 152 to 154 or maybe even a bit higher. The other part may be the amount of time and the temperature while it was maturing in the keg. I'd want to leave that stout at room temperature for about 3 to 4 months before chilling it. That much time maturing will give it much more body and smooth out the flavors.

 

Rm-NM thanks for your input! Yeah ima put my money on the mash temp. I had no clue that the stout should maturate at room temp for that long. Thanks!

 

Thanks Yooper for your advice!