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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Flaked corn off-flavors
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Old 03-01-2010, 05:20 PM   #1
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Default Flaked corn off-flavors

My first two all grain batches were awful!! They tasted grainy and like cardboard. That was two yeas ago. I attributed them to the crappy city water and have been using bottled water and a ph stabilizer ever since with no problems. I also have not used flaked corn since those first batches. Last month I brewed a lager with flaked corn and now it has the same taste!!
Is there something that I need to do different with the corn before or during the mash? I do a simple batch sparge with a protein rest at the beginning. Any help would be greatly appreciated.

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Old 03-01-2010, 05:21 PM   #2
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Maybe you just don't like the flavor?

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Old 03-01-2010, 05:30 PM   #3
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the cardboard flavor is oxidation. you are aerating someplace your not supposed to.

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Old 03-01-2010, 05:36 PM   #4
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To be clear, your flaked corn wouldn;t happen to be frosted would it?

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Old 03-01-2010, 05:40 PM   #5
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No it's not frosted

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Old 03-01-2010, 05:45 PM   #6
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Good. Assaid, the cardboard indicates oxidation. Likely entrained post boil at some point in your process. But, "maybe" a stretch could have some to do with the age of the flakes too. Just cause you had them a week doesn't mean they couldn' be years old. In fact, I don' buy adjuncts from my LHBS because they sit forever.

Maybe next time give it a go with Organic cereal flakes from a health food store. If the flavor re-occurs it may have something to do with your process and that the beer is so subtle it shows through where it otherwise wouldn't.

I assume this is a American lager? Thoise can be a b1tch to brew as they highlight everything that one can or could do without 100% precision.

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Old 03-05-2010, 11:45 PM   #7
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Could the grainy flavor be caused by improper grain milling?

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Old 03-06-2010, 12:03 AM   #8
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Could the flaked corn taste be DMS?

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Old 03-06-2010, 01:41 AM   #9
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Sounds like oxidation and tannins extracted from the husks.

Try a really simple recipe (preferably one that's tried and true that others her report success with).

Don't splash the wort while it's hot. Don't splash the beer while it's fermenting or after it's fermented. Don't oversparge.

Can you isolate anything in your process where you might have done any of the above?

@Meddin - OP wasn't talking about a corn flavour but wondering if the cardboard flavour could be attibuted to the use of flaked corn.

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Old 03-06-2010, 02:40 AM   #10
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I don't splash anything or anytime. It's strange. I have brewed over 30 batches w/ no problems. I batch sparge, so I don't see how I could over spage. I'll just try it again and try to narrow down the problem.

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