Can I mash the day before I boil?

Brewing processes and methods. How to brew using extract, partial or all-grain. Tips and tricks.

Moderator: slothrob

Can I mash the day before I boil?

Postby thecardiffmonkey » Sat Sep 17, 2005 2:09 pm

I've been homebrewing now for about six months, and my standard technique is to mash a couple of pounds of pale malt, some crystal, and speciality grains for 30 minutes at a time at three temperatures (40C, 64C and 70C) and then sparge and start the boil with LME added. However, I am restricted to about three hours (due to work, whining wife etc), so I find I am rushing like mad to finish my brew in time. Does anyone know if its possible for me to mash and sparge my grains in the evening, allow it to cool and then start the boil the next morning? Ive picked up lots of information from this forum, but this is my first post, so please be gentle with me!
Posts: 1
Joined: Sat Sep 17, 2005 1:55 pm
Location: Cardiff, Wales, UK

Postby BillyBock » Sat Sep 17, 2005 3:12 pm

I see this come up from time to time and some people do it without incident. It doesn't sound like you'd have a large volume of wort--could you refrigerate it? I think your biggest threat is spoiling microbes souring your wort before you get to boil it to kill them.
Imperial Stout
Imperial Stout
Posts: 561
Joined: Sun Dec 31, 2000 12:37 pm
Location: Ohio

Overnight mashing

Postby brewmeisterintng » Sat Sep 17, 2005 5:56 pm

I have read about it but never actually tried it myself. I usually block out a time to brew (6 hours). My wife is very understanding that I have a schedule to keep and while I'm mashing (60 to 90 minutes) I can be at her beckening call but during the sparge and boil she is welcome to visit and chit chat but my focus is directed to the brew. I would search BYO as I belive that is where I read about the guy that would mash late in the evening and sparge/ finish in the morning. Spoilage and wild yeast strains are your only enemy.

User avatar
Strong Ale
Strong Ale
Posts: 382
Joined: Thu Jan 13, 2005 9:47 pm
Location: Clarksville, TN

Mashing one day Boiling the next.

Postby kandrew54 » Sun Feb 11, 2007 9:25 pm

I have tried this and it seems to work OK.
I just make sure everything is real well sanatized and cover the Wort as soon as it is finnished. Actually I use a 30L pail with a hole in the lid to collect the wort, and plug the hole with a sterile stopper as soon as it is finnished running.
The "Wizard" on BYO did an article on this and he recomends not keeping it for more than a day or two. I personaly make sure I boil it first thing the next day. I have never tried keeping it longer than about 12-16hrs before boiling. 8)
Posts: 2
Joined: Sun Feb 11, 2007 8:30 pm
Location: Surrey B.C.

How about a week?

Postby cleone » Wed Feb 21, 2007 10:16 pm

Its been some time since I tried it, but I had one batch that I collected a couple extra gallons from my mash. I boiled 6 gallons the same day and stored the remainder in my fridge for about week. I essentially used the remainder to create a second mini-batch.

Comparing the main batch and the week-old wort batch, there was little noticeable difference in taste or quality.

I would agree that you need to be careful to fully sanitize everything to avoid off flavors/spoilage, but I can't image storing for a few days being a big problem.

Light Lager
Light Lager
Posts: 45
Joined: Thu Jan 26, 2006 6:43 pm
Location: New Jersey

Return to Techniques, Methods, Tips & How To

Who is online

Users browsing this forum: No registered users and 3 guests