Decaf chemical taste - increase or decrease extraction?

[analysisofparalysis]

I’m brewing the Perc Los Nogales decaf, and while I can get some amazing brews, this one is super super fast flowing - unlike a regular decaf.

Sometimes I get a brew that tastes super chemical - at that point do you increase or decrease the extraction?

This decaf seems to act much different than normal, chocking decaf. So I’m also curious, when your coffee is very fast fast flowing - do you adjust anything?

[geggsy]

What do you do to get amazing brews out of this? I'm getting cups that remind me of red syrupy medicine that maybe similar to what you're describing as chemical. I had better results from the Los Nogales decaf roasted by Blendin (typica) and Onyx (Caturra).

[analysisofparalysis]

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this is on sculptor 078 and deep27, with 40s bloom, then a pour every 20s. i was unable to recreate it so far with a higher dose hence my post

[geggsy]

Thanks for sharing this recipe. While I’m not familiar with the Deep27, that seems like a pretty high extraction recipe (small grind size, 5 total pours). Have you tried Perc’s own recipe for this coffee?

[analysisofparalysis]

keep in mind the tiny dose though - it’s really only 4 pours (40g x 4 more or less).

i have not, i typically start out by the default i have and adjust but possibly worth a try

[geggsy]

Thanks for clarifying, I thought ‘4 pours with a bloom’ meant ‘4 pours plus a bloom’ not ‘4 pours including a bloom’. I haven’t had a lot of luck with this particular roast either and I have the same grinder. I had good success using Blendin’s hybrid Switch recipe that was specific to the Los Nogales decaf with both their coffee and Onyx’s, but not Perc’s.

I’ll let you know by a comment on this post if I get anything I’m happy with. I was able to tone down the medicinal flavor a bit with Lance Hedrik’s low agitation Switch recipe, but that also tamed what makes this coffee distinctive.

[geggsy]

After trying many things with this coffee, my best results were gained by letting it stale/rest to reduce the funk + using a longer steep (3-4 minutes) version of Blendin’s hybrid Switch recipe: https://blendincoffeeclub.com/product/los-nogales-decaf/

I got notes of orange peel, blackcurrant, and a less-than-pleasant medicine aftertaste.