Buttery and cloudy.. Do diacetyl rest or keep cold?

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GratefulBear

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I did a couple different things with two of my most recent batches (in part due to being really busy) and ended up with cider that is more cloudy and buttery than I'm used to. They are part local blended sweet cider and part Whole Foods glass jug juice, champagne yeast, with fermax yeast nutrient. They spent almost two months in primary around 67 degrees and then did a full 5 weeks of cold crashing at 40 deg in the keezer and were never moved or bumped into. I was expecting very clear cider after such a long cold crash but when I transferred to the next keg, it was cloudy enough that you can't see through the pint glass at all, almost but still can't see through. It's my first time using yeast nutrient and I'm guessing the yeast nutrient contributed to the cloudiness. I know I can use some pectic acid to clear it up, but I'd like to understand what happened.

They also taste very buttery, and I'm assuming diacetyl is to blame. I'm conflicted on whether to bring them up to 75 deg for a few days for a diacetyl rest. I'm not sure if that will let the remaining yeast clean up the batch or if the culprit is naturally occurring LAB. If there's LAB, then I'm afraid the diacetyl will only get worse by raising the temp. This one is outside my paygrade, can any of you seasoned pros chime in?
 
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GratefulBear

GratefulBear

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After having more time to think about this, my guess is that the fermentation never finished. Even though a two month primary is way longer than I usually do and I've done 2 week primaries and then directly to kegerator with success, this fermentation was going really slow at 67 degrees. There was barely any activity in the blowoff tube the whole time. Although it is definitely boozy, I think what I'm tasting is live yeast that are still suspended. It definitely has a "Scrumpy" taste. When I did a 5 week "cold crash", all I did was cryogenically freeze the yeast :) Perhaps using yeast nutrient contributed to a healthy culture that couldn't be hampered by 5 weeks at 40 degrees... I'm going to pull them out of the keezer and bring them up to the second floor (around 72 degrees) and burp the kegs once or twice a day to see how much fermentation is happening.
 
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Cloudy and buttery after 2 months- I'm guessing you might have a contaminant.
Yeast nutrient won't give you a cloudy product.
I agree with you- warm it up to basically do a D-rest, and hope for the best.
You didn't list any SG readings. That might help guess what's going on.
 
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GratefulBear

GratefulBear

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One of the first ciders I made was a Scrumpy on purpose (request of a nostalgic British uncle-in-law). I attributed a lot of the flavor to the Honeycrisp apples but now that I'm remembering back to about 3 years ago, these taste very similar. I'm optimistic that I'm just tasting a lot of suspended/live yeast... I'll report back in a few weeks. :)
 
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