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Old 09-23-2010, 10:53 PM   #1
Big10Seaner
 
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I'm curious to see people's thoughts on calculating IBUs for mash hopping. I'm brewing an imperial ipa and was thinking about calculating it as FWH.
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Old 09-23-2010, 11:02 PM   #2
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Do mash hops contribute to bitterness? I'm not totally up on the process.

Do you put them into the BK, or do you leave them in the mash tun with the spent grains?

 
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Old 09-23-2010, 11:02 PM   #3
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You don't get much out of it. I would say 3-10 IBUs depending on AA and amount. I think I calc'd 7 for an ounce of chinook at 11 AA.

 
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Old 09-23-2010, 11:35 PM   #4
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I would agree- MH shouldn't contribute significantly to IBUs. You're not boiling the hops, only using them in the mashtun. Sure, you boil the wort after that, but my thinking is that you don't get much isomerization because of the removal of the hops. I could be wrong, of course- I'd appreciate any experts who actually know the science that could explain it.

I have over a pound of chinook, so I'll be experimenting with some mash hopping myself this winter.
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Old 09-24-2010, 03:30 AM   #5
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According to Promash, you should get about 70% of the utilization compared with a 60 minute boil.

-a.
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Old 09-24-2010, 08:37 PM   #6
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What's the benefit? I've heard of it, but I've never really understood how or why to use it.
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Old 09-24-2010, 08:44 PM   #7
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In my experiment mash hopping contributed just more bitterness (assuming from what made it through the braid) and not much flavor as of transferring to secondary.
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Old 09-24-2010, 08:46 PM   #8
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Quote:
Originally Posted by Killinger View Post
What's the benefit? I've heard of it, but I've never really understood how or why to use it.
Quote:
Originally Posted by SwampassJ View Post
In my experiment mash hopping contributed just more bitterness (assuming from what made it through the braid) and not much flavor as of transferring to secondary.
my understanding is it just gives a more rounded bitterness similar to FWH and just another place to add hops for us hopheads

 
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Old 09-25-2010, 03:51 AM   #9
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I'm curious now too. I've heard of hopped extract, but I've never seen an AG recipe calling for hops in the mash. I'm assuming this is how hopped extract is made, but if they get very low utilization out of it, I'd think it would be more cost effective to just include the bittering hops in the kit rather than mashing them for the extract.

 
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Old 09-25-2010, 11:25 PM   #10
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For my first AG batch, the LHBS guy recommended a recipe that happened to call for mash hopping. I had not heard of it, basically ignored it (i.e. put the hops in for 60), and forgot about the technique for a while. Lately, I've been using FWH for most batches. I guess I haven't missed much, huh?
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