Amount of base malt to convert adjuncts? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Amount of base malt to convert adjuncts?

Thread Tools
Old 10-23-2005, 09:57 PM   #1
Sep 2005
Bay Area, California
Posts: 48

I understand, from "How to Brew", that many adjuncts (I'm especially thinking oatmeal here, for a porter) require mashing with an enzymatic base malt to become fermentable. My question is, what's an appropriate ratio of base malt to oatmeal, given that I'm only doing a partial mash rather than an all-grain batch? I don't recall seeing this info anywhere; if there's an online calculator or guide somewhere, link away...

Reply With Quote
Old 10-23-2005, 10:11 PM   #2
david_42's Avatar
Oct 2005
Oak Grove, Oregon, USA
Posts: 25,599
Liked 158 Times on 148 Posts

I'd go a pound of base for a pound of oatmeal or rye. And it's always a good idea to precook/boil oatmeal before adding it to the mash.

Reply With Quote
Old 10-27-2005, 01:03 AM   #3
Aug 2005
Baltimore, MD
Posts: 298
Liked 1 Times on 1 Posts

Are you doing all grain or partial mash? If your adjuncts don't go over 10% (and why would they?) you should be fine. If you're extra-paranoid, you can add some amylase to the mash.

well, if i would've read your post carefully, I would have seen that you're doing a partial mash. so listen to the others who read your post more carefully i need some sleep. good night cruel world!

Reply With Quote
Old 10-27-2005, 01:20 AM   #4
ScottT's Avatar
Aug 2005
Hurst, Tx
Posts: 653
Liked 1 Times on 1 Posts

1 to 1 ratio. Just match all your specialty malts and adjuncts pound for pounnd with a base malt. Even more base malt won't hurt. If your total grain bill is less than 3 pounds, add base malt to reach 3 pounds. This helps with heat retention and filtering in the mini-mash.

Primary: Empty

Secondary #2: Empty

Bottle Conditioning: Oatmeal Stout

Drinking from Keg: Ordinary Bitter, Kolsch

Drinking bottled: Brown Autumn Wee Heavy
Hefe Weizen
Peaches and Cream Weizen

"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption... Beer!"
-Robin Hood, Prince of Thieves, Friar Tuck.

Next up: Hefe Weizen

Reply With Quote
Old 10-29-2005, 05:27 AM   #5
Aug 2005
Tampa, FL
Posts: 606
Liked 7 Times on 6 Posts

For what it's worth, 6 row has greater enzymatic power than 2 row. While some say the 6 row will lend more of a grainy taste I've never noticed it (though I do usually stick with 2 row anyway). Anyhow, if you're concerned then you could try using 6 row base malt.

Reply With Quote
Old 10-30-2005, 01:37 PM   #6
Senior Member
ajf's Avatar
Oct 2005
Long Island
Posts: 4,646
Liked 106 Times on 100 Posts

I wouldn't go above 20% fermentible adjuncts. (Source: Papazian - The new complete joy of home brewing),

Assuming you flaked oats, they should not need precooking as they were cooked during the flaking process (Numerous sources including Papazian).

Good luck.


Reply With Quote
Old 10-30-2005, 01:48 PM   #7
DeRoux's Broux
DeRoux's Broux's Avatar
Nov 2004
Beaumont, Texas
Posts: 2,959
Liked 6 Times on 4 Posts

Originally Posted by PeatReek
I don't recall seeing this info anywhere; if there's an online calculator or guide somewhere, link away...
peatreek, try it's a very good brewing software that you can down load a free sample or order it on-line. almost any HBS will have the software too ($25). ifyou download the trial version, it will let you save three recipes. or, you can use it to calculate, write it down, then just don't save it and you can use it over and over. helps w/ water calculations, grain bill, IBU's, etc. i love it!
DeRoux's Broux

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
For what malt can I substitute Euro Pils for the base malt? msheraw All Grain & Partial Mash Brewing 5 10-24-2009 07:06 PM
Base malt to replace dark malt extract GNBrews All Grain & Partial Mash Brewing 8 12-11-2008 04:22 PM
Max non-diastatic adjuncts for several base malts billtzk All Grain & Partial Mash Brewing 10 09-15-2008 09:58 PM
Convert Plain Malt to Extra Light Malt Extract BlackZX3 Extract Brewing 3 08-01-2007 02:12 PM
Using Vienna malt as base malt fungusamungas All Grain & Partial Mash Brewing 7 05-30-2007 03:16 AM

Forum Jump