Frozen grains cool the mash. Duh! - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Frozen grains cool the mash. Duh!

Thread Tools
Old 09-09-2012, 08:44 PM   #1
calebgk's Avatar
Apr 2012
Stratford, Ontario
Posts: 142
Liked 15 Times on 9 Posts

I brewed Orfy's Hobgoblin yesterday. I had a problem with my mash. I started with 3.5 gallons @ 165, added the grains, expecting to stir it down to 152, and the mash dropped to 138!

I had put the grains in the freezed because they had some bugs (not buying from that supplier again.) I completely forgot to take that into account when I started my brew day. So, I put freezing grains in my MLT, dropping my mash temp too low. Stupid!!

So, I removed 1/3 of the mash to the kettle and brought it up to as close to 170 as I dared, and then re-added it to the MLT, stirred and checked. I got 152 and it held for the full hour.

So, I'm not sure if this can be considered a decoction or not, but what are the implications of my screwup? Should I be okay? It's already blown off and made a mess, so I know it's fermenting well.

Reply With Quote
Old 09-09-2012, 08:46 PM   #2
Waste Allocation Load Lifter - Earth Class
passedpawn's Avatar
Apr 2009
☼ Clearwater, FL ☼
Posts: 27,412
Liked 7365 Times on 4376 Posts

Yea, if you boiled that would be a decoction. No worries. Good thinking.
- Andrew

Reply With Quote
Old 09-10-2012, 03:27 PM   #3
May 2012
Raleigh, NC
Posts: 2,331
Liked 389 Times on 326 Posts

I don't think it is "technically" a decoction unless you actually boil the removed mash, but yeah, same principle. Supposedly, the process brings malt flavor to the forefront.

You didn't really have to worry about the 170 limit. The low mash PH protects against any concerns of releasing tannins etc.

You also came pretty darn close to a protein rest with the remainder. Depending on the grains in question, that may or may not have done anything.

Overall - just sounds like a good save to me.

Reply With Quote
Old 09-10-2012, 03:49 PM   #4
jfrizzell's Avatar
Jun 2007
Posts: 686
Liked 12 Times on 10 Posts

I freeze my grains too to kill off any bugs, but I only leave them in for about a week, then take them out. You don't need to store the grains in the freezer.
Primary: Pliney the Elder Clone
Kegged: Tank 7 / Saison Brett

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
overnight mash and keeping my cool wickman6 All Grain & Partial Mash Brewing 116 01-22-2015 09:54 PM
how much grains to mash in place of DME JDSanders All Grain & Partial Mash Brewing 1 04-14-2012 11:02 PM
What to do with non-mash grains prrriiide All Grain & Partial Mash Brewing 2 09-08-2010 12:46 PM
Cool mash for OG reading? skifast1 All Grain & Partial Mash Brewing 11 08-23-2007 01:33 AM
Cool Box Mash Tun BlightyBrewer All Grain & Partial Mash Brewing 19 03-01-2006 08:26 AM

Forum Jump