[war2112]

I wonder how much actual marshmallow flavor would be noticeable after the sugar is fermented away, especially in a stout. I wouldn't think it'd be noticeable but I could be wrong. No harm in trying it though.

Most of the non-sugar flavor comes from the vanilla, so there would be something there.

Yep.  Drew recently made a Fluffernutter beer and the marshmallows were represented by vanilla.  I certainly wouldn't waste delicious homemade marshmallows for this.

Noted, but my co-worker would like to feel like they had a hand in it with their marshmallows and thereby score more "samples" from me. You know - like a 6-pack sample! She really liked my stout and when she brought in some of her marshmallows an idea was born.

I do believe 3 Floyd's adds theirs post fermentation. Honestly, I still haven't seen a lot of advice on that yet - as to whether to add in boil or post or both.

I realize I could just pour the liquid ingredients in but the idea is to combine 2 homemade things into one. Just for fun and hopefully good taste and enjoyment.

[war2112]

Where did you get the kit? Acid malt is a very odd ingredient for a stout extract kit. By all means use it if your happy with the results.

+1.  You'd definitely not want to drop pH for a stout.

Ok, you guys bring up an interesting point. The kit is from my LHBS called Great Fermentations. How much would .20 lb of acid malt drop the pH and should I add to the RO water to bring it back up. It would be impossible to eliminate the acid malt from the kit as the steeping grains are mixed together. I realize I could just replicate the kit by buying the elements separately and forgoing the acid malt. That being said, the stout turned out real well. I bought my first Guinness in years just to compare and it was so very very close.

Thanks

[Stevie]

I've never bought from them, but I hear that they have been around for ages and are very reputable.

The acid malt is lowering the pH of the steep, but considering it is just a steep, I don't think it will matter. I don't think it will help in a mini-mash which I figured you were doing considering the use of flaked barley (must be mashed). It might not hurt either as long as you keep your temps under control.

[HoosierBrew]

Where did you get the kit? Acid malt is a very odd ingredient for a stout extract kit. By all means use it if your happy with the results.

+1.  You'd definitely not want to drop pH for a stout.

Ok, you guys bring up an interesting point. The kit is from my LHBS called Great Fermentations. How much would .20 lb of acid malt drop the pH and should I add to the RO water to bring it back up. It would be impossible to eliminate the acid malt from the kit as the steeping grains are mixed together. I realize I could just replicate the kit by buying the elements separately and forgoing the acid malt. That being said, the stout turned out real well. I bought my first Guinness in years just to compare and it was so very very close.

Thanks

Cool, GF is my LHBS, too! And they do make nice extract with grains kits. Since the beer came out good, I assume they meant it as a Guinness type (Irish) stout. In which case a slight acidic twang wouldn't be out of place at all. In general I'd never use acid malt in a stout with the exception of targeting a slightly lower pH for Irish stout. As for brewing kits, I would always use RO or distilled - the extract included already contains brewing salts the companies used in their mash before concentrating the wort into extract. RO or distilled helps prevent you from overmineralizing your beer when using extract. 

[a10t2]

Especially with Indy tap water.

As far as the mallows, I'd consider a mini-mash instead of steeping grains to at least start breaking them down. A pound of pale malt should be able to convert ~2 lb of adjuncts. Otherwise I'd probably dice them and throw them in the fermenter at pitching.

[HoosierBrew]

Especially with Indy tap water.

No joke.

[EHall]

I'm not a marshmallow fan but what I do know is store bought are disgusting. Homemade are so many worlds better... don't waste them in a beer. use them for smores and add this to your beer: https://www.monin.com/m/toasted-marshmallow-syrup-1.html

then drink the beer with smores.

[brewinhard]

Just a thought...I believe Silver Cloud Estates sells an Olive Nation Marshmallow extract which is reportedly pretty good. I would probably add that if it were me.