General Category > All Grain Brewing

dark malts on sparging

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denny:
George Fix started talking about cold steeping 15 years ago, based on info from Mary Ann Gruber, who was with with Briess at the time.  Here's some info from them from an old HBD...

http://hbd.org/clubs/cascade/public_html/brewing/index.html

jeffy:

--- Quote from: pachuquin17 on December 20, 2012, 07:39:45 AM ---Hello, if i want to do a porter style with all dark and crystal grains mashed on the sparging, can i neglect the acidification effect of those malts? if yes, i just take the effect of base malts and apply some phosporic acid to achieve a ph 5.2-5.4 on the mash tun?

do you have a better option?

thanks!

--- End quote ---

This is what I've been doing lately.  Mashing all the diastatic malts, acidifying as you mentioned with lactic acid because my local doesn't carry phosphoric, then after the mash capping with crystal and roast malts, vorlauf and sparge.  It lets you set the pH for the optimal mash time after time.

hopfenundmalz:
There was a Zymurgy article by Mary Ann Gruber about this back around 2000 or so. Use the sear h function on the AHA page for Zymurgy to find it. On my phone right now.

ajk:

--- Quote from: kylekohlmorgen on December 20, 2012, 07:59:05 AM ---What kind of flavor difference do you get here? Significantly less acrid/roasty character?

I've been thinking about trying this with an existing recipe, but I want to make sure I account for it in my recipe.

--- End quote ---

Kyle, I suspect you and I have similar, highly alkaline water profiles.  I too have considered the cold-steeping method, but I think I'd then have to adjust my water to lower the mash pH—I feel like we get that adjustment for free with dark malts.

Still, I'd like to triangle-test two beers made both ways (one pH-adjusted by dark grains in the mash, the other with dark grains cold-steeped or added during the sparge and pH-adjusted by RO dilution or acid additions).

ajk

hopfenundmalz:

--- Quote from: hopfenundmalz on December 20, 2012, 08:07:50 PM ---There was a Zymurgy article by Mary Ann Gruber about this back around 2000 or so. Use the sear h function on the AHA page for Zymurgy to find it. On my phone right now.

--- End quote ---
The Zymurgy article can be found online now. Jan-Feb 2002 issue.

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