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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Doubling a recipe?
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Old 10-19-2012, 02:01 AM   #1
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Default Doubling a recipe?

I recenty acquired a keggle that I plan on using for a double batch this weekend. I took one of my regular 5 gallon recipes and used my brewing software to double/tweak the grain bill, readjusted the hop schedule, etc...

The one thing that's really giving me issues is the mash schedule. I have somewhat limited capacity in my cooler and so I'm planning on doing a double batch sparge...hoping this will help with lowered efficiency that I tend to get with bigger grain bills as well. How does this mash schedule look for a target 11 gallon batch with a grain bill of 25 lbs:

Name Type Amount Temp Target Temp Time
Initial Strike Infusion 6.875 gal 171.024 F 156.000 F 1.000 hr
Batch Sparge Infusion 1.546 gal 212.000 F 165.000 F 10.000 min
Batch Sparge Infusion 6.829 gal 177.055 F 165.200 F 15.000 min

I don't know why the software keeps giving me uneven amounts of water for my two batch sparges. Should I adjust them? Any other tips you guys can give me?


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Old 10-20-2012, 11:51 AM   #2
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giving this a whirl here in a few hours...any input?


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Old 10-20-2012, 11:56 AM   #3
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I would double sparge with the same amounts. I will admit I have no experience doing it but do not see why it would hurt anything.
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Old 10-20-2012, 04:11 PM   #4
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I agree, I would do 2 equal sparges. There should be a setting in the software to to use equal batch sizes.
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Old 10-20-2012, 04:48 PM   #5
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can't get the software to cooperate for some reason...

2 sparges of 4.2 gallons heated to 184 sound right??
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Old 10-20-2012, 05:04 PM   #6
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I think your first batch sparge infusion is really a mash out. 2 sparges of 4.2 gallons sounds about right, but I cannot comment on the temperature because I fly sparge.

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Old 10-20-2012, 05:19 PM   #7
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Quote:
Originally Posted by ajf View Post
I think your first batch sparge infusion is really a mash out.
Is that just a semantic difference or should I do something differently than I typically would with a batch sparge?
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Old 10-20-2012, 06:34 PM   #8
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A mash out is unnecessary with a batch sparge, and if you heat the sparge water high enough, the sparge effectively performs the same function as a mash out. Assuming your temperature is correct (other batch spargers should be able to confirm that), your suggestion makes a lot more sense to me than Beersmith or whatever you are using.

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Old 10-20-2012, 06:40 PM   #9
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I've collected all my runnings and ended up dead on with my pre-boil gravity. Thanks for the responses everyone - I say it all the time, but one more won't hurt...

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