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Old 07-12-2012, 08:39 PM   #1
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Default PM - Founder's Breakfast Stout: Enough diastatic power?

Howdy,

I'm brewing a PM version of the Founder's Breakfast Stout clone this weekend and picked up my ingredients today after doing the math to sub some extract for 6 of the 9 lbs of 2 row.

In addition to the extract, my grain bill is:

  • 3 lbs 2 row
  • 22 oz. flaked oats
  • 1.0 lb. crisp chocolate malt (412L)
  • 12 oz. roast barley malt (300L)
  • 9 oz. debittered black malt (550L)
  • 7 oz. crystal malt (120L)

I've been partial mashing for a while but this is my first time doing the conversion from AG myself; my question is will this have enough diastatic power to fully convert, or do I need to sub out some of the extract for another pound of 2 row? (I'd do the math on this myself but haven't found a list of Lintner values for those grains; anybody have a link?)

I'll BIABing in my 5 gallon brew kettle so I have some space to give, but not a ton.
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Old 07-12-2012, 10:25 PM   #2
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3 lbs 2 row should have sufficient diastatic power to convert itself and 22 oz flaked oats. The other items don't require conversion, so you should be OK.

-a.

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Old 07-13-2012, 04:42 PM   #3
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Agreed, 3 pounds of two row is more than enough to convert the wheat. I just did an America wheat beer with 50% 2 row and 50% flaked wheat with good conversion.

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Old 07-13-2012, 09:51 PM   #4
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Thanks for the responses, fellas. Did some more searching on the forum last night and came across this thread, and thought the rule of thumb it mentioned—that roasted & crystal malts don't need to be mashed—was really helpful.

Thanks again.

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