An undesired flavor in the final beer. The flavor may be undesirable in any style, such as soapiness, harsh astringency, or may be out of place in the style being brewed, such as fruitiness or diacetyl in a lager.

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All my all-grain batches produce a bitter/astringent, dark, almost burnt off flavor that ruins every batch, from light pilsner to dark belgians

I'm scratching my head trying to figure this one out. Here's the story: I started brewing extracts, and they all came out great. I wanted to get into all-grain so a last year I ordered myself the ...
9
votes
3answers
302 views

What type of reference beer should I use for flavor doctoring?

I've been looking for resources on how to really taste some of the commonly referred to tastes out there. For instance, people say that phenols taste like band-aids. But I really have no clue what ...
9
votes
1answer
2k views

What are the primary causes of Acetaldehyde?

I'm a bit confused about this. In my own experience, I'm no longer experiencing acetaldehyde flavours in my beer after improving my aeration methods and at the same time starting to use yeast ...
7
votes
7answers
460 views

Most common and obvious off-flavours for homebrewers

I heard about some possible errors in the process that cause off-flavours (for example skunk due to sunlight). Excluding infection problems, and talking about most obvious errors one can do and are ...
7
votes
3answers
1k views

Will a “pink bubblegum medicine” flavor dissipate?

I brewed a "Belgian IPA" a few weeks ago, and now that it's carbonated, I get a flavor that is eerily reminiscent of the pink bubblegum medicine that I used to get when I was sick and under 10 years ...
7
votes
4answers
814 views

Strange aftertaste in mead?

I've been making mead for a while and there's something I can't quite resolve. Some batches are said to have a strange, solvent-like or "turpentiney" after-taste. Most people don't seem to notice it ...
7
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2answers
1k views

My beer tastes like green apples.

I brewed a blonde ale with extract a little over a month ago. I fermented in primary for three weeks and have been bottle-conditioning for two weeks. I didn't take an OG, but the final gravity ...
6
votes
5answers
2k views

Soapy off-flavour source?

I have made 3 batches of beer now which each had the same off flavour but I don't really have a clear idea of the source of the problem. It's a kind of soapy cleaning flavour but doesn't match up any ...
6
votes
2answers
210 views

How do I determine where the off-flavors of my brew are coming from?

Is there a website I can visit that will describe where different off-flavors come from? For instance, if the beer tastes malty, fruity, or bitter, where can I go to determine why?
6
votes
4answers
1k views

Taste Test for Stale Beer

I am curious to know what stale beer really tastes like. For me I can read about what certain off flavors are supposed to taste like. However, taste and flavor can be so subjective its hard to ...
5
votes
4answers
2k views

What is Extract Twang?

This term pops up from time to time and it often cited as a reason to go to all grain. But maybe its because I don't really know what it tastes like. Do you believe in extract twang? How do you get ...
5
votes
2answers
356 views

Why would aeration cause diacetyl

My BJCP Course states that (too) late aeration can cause diacetyl. My understanding is that diacetyl is produced by yeast during the first phase of fermentation. How could too much oxygen in a ...
5
votes
3answers
1k views

Why does my beer taste like bacon?

I recently brewed an oatmeal stout that has distinct bacon notes to it, both in the nose and in the flavor. What could be causing these flavors? This bacon-ness isn't disagreeable; it's actually ...
5
votes
1answer
686 views

What flavors come from fermenting S-04 on the warm side?

I brewed this 1064 OG recipe and used my reverse flow chiller to get it down to 74F (could have gone cooler, but my starter was at 76F or so). It fermented like nuts (over 1.5 gallons of krausen ...
5
votes
1answer
2k views

What is the white film on my beer in my bottles?

I brewed a double batch of IPA with a buddy about 8 weeks ago. We split this into two 5 gallon pails and 2 weeks later into two carboys. His was fine, but mine developed a bit of white stuff on ...
5
votes
1answer
81 views

“Focus on Flavor” Column

I am trying to locate copies of a complete set of Scott Bickham's "Focus on Flavors" column in Brewing Techniques, which seems like it was a journal or magazine in the 1990s. The question is can ...
4
votes
2answers
512 views

How to prevent astringency?

My last few beers (all grain) have been a little astringent--there's a dry, almost chalky aspect to the beer. What are some things I should do to bring the astringency down?
4
votes
3answers
983 views

How to avoid a boozy flavor in high-gravity beers

Many of the high-gravity commercial beers I taste end up coming off as boozy. What kinds of ingredients or processes will limit this flavor? I want to brew a big beer, perhaps in the 1.100 ...
4
votes
1answer
561 views

Will using a 2-liter soda bottle as a growler affect flavor?

Just read an article about a NYC beer hall filling 2-liter plastic soda bottles instead of glass growlers. I wouldn't expect this to make a significant difference over 24 hrs, but is there any chance ...
4
votes
5answers
625 views

Why does my cream ale taste like a witbier?

Imagine my surprise when I opened a bottle of my cream ale and found that it had picked up a clove-y flavor reminiscent of a wheat beer. It's not even presented as a risk in the BJCP guidelines for ...
4
votes
5answers
7k views

Sour Off flavor

Our last 4 or 5 batches have had a distinctive sour flavor to them even though each has been a completely different style (wit, brown, 2 stout, hefe). What are the common reasons to get a sour off ...
4
votes
1answer
221 views

Off flavor/odor from cold break

On page 63 of Brewing Better Beer, Gordon Strong says, Some of the cold break material can actually help the yeast, but too much can contribute off-flavors. I can attest to both of these. A ...
4
votes
1answer
192 views

How to prevent solventy/overly alcoholic flavors?

I'm a moderately experienced homebrewer, and recently I've been making a lot of imperial stouts--variations on the same recipe, hoping to dial it in. Decently strong ones: my OG is usually around ...
4
votes
2answers
289 views

Estery fruit flavors in my vanilla bourbon imperial porter

I'm still pretty new to home brewing, so I'm sure I made about a hundred mistakes with this beer. I brewed a 1.079 OG imperial porter, and used Safale 05 (only one pack, unfortunately). First of all, ...
4
votes
1answer
165 views

Moldy taste appearing months after bottling

I brewed and bottled an English Ale in August, and, after a few weeks in the bottle, promptly drank most of the 5 gallons. However, I'd heard some advice to leave a few bottles for a few months to ...
4
votes
2answers
450 views

Off-flavors from bottle conditioning, but not kegging

I have brewed some 20l batches where I have kegged half in a 9l corny keg, and bottled the rest with sugar for priming (plain white sucrose). In a couple of these batches the kegged beer has been ...
4
votes
1answer
222 views

Can I “boil” off acetaldehyde?

This is something interesting I noticed over the weekend. One of my beers has that distinct green apple smell to it. (I had to keg it early because I needed the fermentor. LHBS accidentally sold me a ...
4
votes
3answers
590 views

Racking a carbonated beer from a keg back to the fermenter

Long story short, I have a wheat beer that has a weird band-aid phenol that isn't going away. Rather than dumping, I thought I would try racking to a new fermentor, adding chopped dried apricots, and ...
3
votes
2answers
210 views

Does skunk off flavour go away?

Skunky off-flavours are caused by ultraviolet light causing chemical reaction that transforms alpha-acids. Once this flavour is created, does it go away with time, and if so how much time? Or will it ...
3
votes
3answers
933 views

My beers are with a slight acid taste after the few first sips. What could be wrong?

So far I have brewed 5 times. First went perfect, though it was the first time I was using my kit and the grains were already ground. Second and third batches went wrong. My concern is with the last ...
3
votes
2answers
238 views

Are there any effects of boiling copper immersion chiller with wort?

I’m contemplating the use of a copper immersion chiller. Currently, doing partial batches, I’m able to cool my wort fairly quickly in an ice bath, then adding cooled water in the carboy. I’d like to ...
3
votes
2answers
437 views

What could cause an earthy flavour in beer?

I've just tried the first bottle from a batch of APA I brewed and it has a very distinct (and unpleasant) earthy / peaty flavour. Reminiscent of healthy soil. The beer also finishes with a very ...
3
votes
1answer
67 views

What are possible causes of a vegetal flavor in mead?

I recently entered my first mead into a BJCP-judged competition (mostly to get feedback), and all three judges reported a vegetal off-flavor in the mead. What could be the cause of this? The mead was ...
3
votes
1answer
176 views

How much sugar does it take to get “cidery” off flavors.

I've added a bunch of sugar to brews before, upwards of 30% of the grain weight and I'm yet to get any cidery flavors. You always hear sugar causes cider, but all I've ever noticed is a thinner body. ...
3
votes
1answer
647 views

Chloramine effects in small quantities

I'm curious what effect (if any) chloramine-treated tap water has when used in small quantities, such as a yeast starter or when boiled with priming sugar to use a priming solution. My municipal water ...
3
votes
5answers
486 views

Galvanized steel off-flavor?

I brewed my first beer with maris otter and it came out with an ashtray/cigarette flavor. At first I assumed it had something to do with the maris otter, but later I noticed my mash tun hose clamps ...
2
votes
3answers
1k views

What is causing a bad flavor after cold conditioning?

I've had something happen to a couple batches and can't figure out what's going on. What happens is a major flavor change after the first two weeks of primary, but for the worse. Normally my beers ...
2
votes
3answers
430 views

Ash/ash tray off flavour

What does cause ash or ash tray off flavour? I made an all grain porter (using chocolate and carafa type I), there is a slight ash tray off flavour. The falvour was apparent at the beginning (just ...
2
votes
2answers
876 views

Combating Diacetyl

I've just finished my first brew (brown ale), and the results aren't quite as spectacular as I had hoped. The issue is a prominent, yet not overpowering, sweet almost caramel-like flavor. As best I ...
2
votes
2answers
970 views

Yeast/Green Apple Taste

I have homebrewed with family many times and never had problems, nor did I with my first batch on my own. The last couple, however, have had a yeasty/cidery/apple odor. Very strong. I doubt it is ...
2
votes
3answers
360 views

Which malts have the highest SMM (precurser of DMS) content?

I've been scouring the internet, trying to find some kind of list of the SMM content in various malts so I know when it would be wise to do a 90 minute boil. I can't find anything, just the definition ...
2
votes
2answers
581 views

off flavors and sanitizing/scratched plastic

I've read through the various posts here and the common wisdom is that off flavors are because of poor sanitizing or using scratched plastic carboys/buckets. I'd like to read from some of the "master ...
2
votes
1answer
47 views

Hop photoisomerization (light effect on transparent bottles)

Very little information can be found around internet about "photoisomerization" in beers. This is a chemical reaction on acids of hops if exposed to the light, such as in transparent bottles. I could ...
2
votes
1answer
49 views

Rye and sulfur (burnt rubber / skunk), how to explain the connection?

I've come to beleve that brewing with Rye often leads to undesired sulfur based 'burnt rubber' off-flavours. I'm pretty sure about it but I only have the following indirect evidence: have recently ...
2
votes
1answer
636 views

What does scorched wort taste like?

I just did my first batch on a campchef propane burner http://cascadeclimbers.com/gear/hiking/product/Camp-Chef-Yukon-Stove.html Problem is that in the during the boil it never crossed my mind that ...
2
votes
4answers
137 views

Remove smell from barrel

What is the best way to remove a faint disinfectant smell from my pressure barrel as its tainted the smell of my lager. I've tried white vinegar, chlorine my usual Sanitiser and just hit water but a ...
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vote
3answers
1k views

Is my copper wort chiller still good?

I haven't had the chance to brew in about two years and I've been storing my copper wort chiller in a storage locker for most of that time. Upon moving and retrieving it yesterday, it's got some ...
1
vote
1answer
128 views

What is/causes a solvent-like aroma from airlock

This happens on a good number of my brews, but if I stick my nose right up to the airlock, or into the ale pail with the lid off (don't do this often), I get an intense solvent-like smell, like to the ...
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vote
3answers
223 views

Bad smell in pump tubing

I recently upgraded from relying on gravity to a pump to transfer wort. After the first use (an IPA), the thermoplastic tubing that I used has a distinctive smell that I attribute to the hot hop ...
1
vote
1answer
640 views

Pitching Whole Starter vs Cold Crashing Effects on Taste

Earlier, I made a thread trying to find a reason for a yeast/green apple flavor in my beer.. After a lot of thought and poking around, I have an idea of why this is, but I wanted your opinions on ...