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Old 02-28-2013, 10:43 PM   #1
Mutt98
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Default First all grain mash question

I've been trying to get ready for my first all grain brew this Sunday. I've picked out a recipe "lil sumpin sumpin" clone from a byo magazine. The recipe calls for a 45 min mash but it seems like an hour is more standard. Do I stick to the recipe or go with the longer mash? I'll be batch sparging and the grain bill is as follows:
10 lb 2 row pale
4 lb white wheat
1 lb flaked wheat
2 oz victory malt

Thanks for the help
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Old 02-28-2013, 10:59 PM   #2
BigRedHopHead
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I would stick with 60 min. 45 is probably ok, but the prevailing thought is 60 should be plenty of time for full conversion.
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Old 02-28-2013, 11:16 PM   #3
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Yeah, I've been planning on 60 the whole time. Just had a doubt slipping into my mind that the mash time change would have some kind of detrimental effect on the beer.
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Old 02-28-2013, 11:32 PM   #4
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Go with 60. After you've been at it a little bit and test how well your water plays with the grain, you could find you only need to mash for 20-45 minutes. But 60 is only ensuring good conversion, it will never hurt the beer.
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Old 02-28-2013, 11:43 PM   #5
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Chances are that conversion will happen within the first 30 minutes, but letting it go longer is a safe bet. 60 minutes is my minimum, regardless of what a recipe says. That way, if there's any areas that didn't get well mixed, they'll have a better chance at getting saturated and thus convert into sugar.

Good luck on your first AG! It's a blast!
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Old 03-01-2013, 01:23 AM   #6
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Awesome. That's what I thought. Just don't want to get off on the wrong foot.
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Old 03-01-2013, 01:56 AM   #7
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Conversion time is REALLY dependent on your crush. If you have a great crush, you could get nearly full conversion in 15 minutes. If you have a mediocre crush (eg average home brew store), you probably won't even get full conversion in an hour. My local store's crush takes about 90 minutes for full conversion.
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Old 03-01-2013, 02:03 AM   #8
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So if I crush my grain with a rolling pin, I should mash for like, two days?
I just bought ingredients for my first all grain batch, but I'm too cheap to buy a mill at this point.
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Old 03-01-2013, 03:06 AM   #9
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Test for conversion using Iodine.


If the rolling pin is wooden and has been used for rolling out larded pie crust or butter cookies. You may need to wait a light year or three for conversion. If it was only used for bashing heads or the occasional squishing of a cockroach. Two or three days will be fine.
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Old 03-01-2013, 01:51 PM   #10
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It was a "not so local" hbs crush, and since it's my first attempt, I don't really have any way of knowing if it was a good one or not. I might go ahead and mash 90 minutes or so just to make sure. Anyone had any problem keeping a rubbermaid picnic cooler tun at mash temp for 90 minutes? Will I need to add some water at some point? I think I remember seeing someone who mashed for 60 minutes and lost 1 deg.
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