Ss Brewtech’s Biggest Baddest Holiday Giveaway Ever!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Decoction For Mash out Question(s)...
Thread Tools
Old 07-25-2006, 08:31 PM   #1
Ivan Lendl
Feedback Score: 0 reviews
Ivan Lendl's Avatar
Join Date: Feb 2006
Location: Wimbledon Finals
Posts: 1,290
Liked 8 Times on 7 Posts

Default Decoction For Mash out Question(s)...

ok so today i plan on doing a single step infusion mash with 14 qt h20 and 11.75 lbs grain (1.2 qt/lbs)
Usually for the mash out i add enough boiling water to raise the temp to 170. But for this batch i want to try using a decoction instead. Im basing my technique on an article i found on this site.

So after 60 min @ 150F im going to remove 4.5 lbs of grain and enough wort to create an oatmeal like thickness. (40 percent would be 4.7 lbs, which is supposed to raise the temp by 28 degrees, im using 4.5 because its easier to measure and i dont need 28 dgrees, just 20) Im adding this to a cold kettle and slowly bringing it to a boil, stirring constantly. I boil for ten minutes then return to mash tun. If the decoction gets too dry i add some more liquid wort.

My questions are these:
1) Is this a sound technique?
2) should i weigh the decoction, or just eye-ball it using 1 qt= 1 lbs of grain estimate?

Primary: empty
Secondary: empty
Bottled: Barbarian IPA
Up next: Configuration 9
Ivan Lendl is offline
Reply With Quote
Old 07-25-2006, 08:45 PM   #2
Feedback Score: 0 reviews
Join Date: Dec 2005
Location: Glasgow, Scotland
Posts: 696
Liked 2 Times on 2 Posts


I may be wrong here, but I would tend to decoct the thin runnings for the mash out. I reckon if you decoct the thick mash for a mash-out step you could end up releasing starches that will not be converted because the enzymes have been denatured. It may be better to do a beta to alpha decoction instead.
mysterio is offline
Reply With Quote
Old 07-26-2006, 05:18 AM   #3
Baron von BeeGee
Beer Bully
Feedback Score: 0 reviews
Baron von BeeGee's Avatar
Join Date: Jul 2005
Location: Barony of Fuquay-Varina, NC
Posts: 5,397
Liked 22 Times on 21 Posts


I concur with decoct for mash out just run off some wort (don't worry about recirculating) and boil it, then return it. You definitely want some type of enzymatic rest following a thick decoction due to the starchies you'll explode open.
Baron von BeeGee is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
First decoction mash tkone All Grain & Partial Mash Brewing 9 03-16-2011 12:30 PM
My first Decoction Mash!!! devaspawn All Grain & Partial Mash Brewing 9 12-28-2008 06:02 AM
What's a decoction mash? Maharg All Grain & Partial Mash Brewing 3 09-29-2007 02:38 PM
Anyone use a decoction mash? SpecialEd All Grain & Partial Mash Brewing 15 03-27-2007 02:50 AM
My first decoction mash jeffg General Techniques 21 02-25-2007 10:12 PM

Forum Jump

Newest Threads