Increasing Body/Mouthfeel Post-Fermentation

Is there anything you can do to increase body/mouthfeel after the beer is fermented?

I did a “clone” of Old Rasputin following an old Zymurgy recipe and it came out pretty thin.  It finished 10 points lower than the expected FG from the recipe and the hydrometer sample leaves me feeling that it just won’t have the body I had hoped for.

you can add maltodextrin powder. possibly lactose. both are unfermentable sugars so they aren’t super sweet but they boost body.

3/4 lb lactose per 5 gallons, baby.

Have either of you done this?

I’m tempted to just let it be.  It’s not bad, just not quite stout enough.

Will maltodextrin dissolve in the fermenter?  Or boil it up in a sauce pan and add it in (cooled, of course)?

Yes, I’ve done this many times.  It works great.  These sugars do not dissolve easily and need to be boiled in a little water just like (or with!) priming sugar.

Alright.  I’ll probably give it a go.

I’m thinking this might be a way to boost the hops a little bit, too.  Throw some in with the maltodextrin, boil for 30 minutes.

Sure, I’ve done that before too.  Yes, it works.