Popper Is A Coffee Roaster

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As much as I was enjoying my cheap home-roasting setup, the coffee I was getting out of it was a bit one-note, especially when doing processes which were easily-replicable. The best coffee I’d gotten was when I didn’t know what I was doing and was trying all sorts of random things.

After reading up a bunch more about what I was doing wrong, all conclusions were that having the popper going at full-blast from the beginning was really limiting my ability to get good, consistent, developed roasts, and after considering adding a PID controller to my popper or other means of temperature control, I decided the easiest next step would be to buy a Popper1.

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What, another grinder?! Timemore Sculptor 064s

As much as I appreciated my Sette 270, there were a few things I didn’t like about it:

  • The fine adjustment mechanism is weird and unpredictable (due to the dual-ring thing)
  • It is incredibly loud
  • Grinding for espresso usually took 3-4 cycles due to popcorning
  • The dang felt pretty huge (relative to my tiny kitchen)
  • It’s built for keeping stuff in the hopper rather than single-dosing

I was considering a number of other grinders (most notably the Option-O Lagom Mini) but then in April, Timemore announced the Timemore Sculptor series, in a number of sizes and grind profiles. And the requisite Kickstarter had it on a pretty deep discount.

So anyway, I backed the 064s (64mm stepless variant) and expected to wait.

And wait I did! But the lovely new grinder arrived today.

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Roasting coffee at home

I love the flavor of coffee, but don’t really care much for caffeine. Unfortunately, finding good roasters that treat decaffeinated coffee with respect is difficult, and the ones which are out there tend to either default to a dark roast, or cost enormous amounts.

But with a $20 popcorn air popper you can roast your own coffee at home, and save a lot of money doing it!

I’ve been doing it.

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My updated current espresso process

9 months ago I posted my then-current espresso process. As this is a constant experiment and processes change over time, I figure it’s time for an update:

  1. I have returned to single-dosing, and have 3D printed a single-dose hopper for that purpose. This makes it less convenient for me to rest/outgas my beans but it’s easy enough to just, y'know, open the bag while it waits in the refrigerator. Oh also I grind into the dosing cup, not direct into the portafilter, and I give the dosing cup a little shakey-shake before pouring it into the portafilter (with a dosing funnel).

  2. My dose is now 18g, and since I’m single-dosing there’s no time calibration necessary. Also, I give the beans a quick spritz with water (aka “RDT” in coffee nerd circles) to cut down on static and clumping.

  3. My leveling process is now to do a vertical tap, and then WDT, with no additional leveling. Also, for the WDT I ended up settling on a bit of cat6 Ethernet cable which I stripped down to the wires which I then straightened, forming a sort of whisk. It’s probably not food-safe, but it works.

  4. I still tamp as before, although as part of my tamping I also turn the tamper around a couple of times to ensure that the puck is flat and releases.

  5. I extract either a 1:2 ratio (i.e. 18g in, 36g out) or 30 seconds, whichever comes first, and use that as a guide for dialing in my grind.

Espresso tonic

A pretty simple recipe for a very nice cold drink.

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My current espresso technique

Update: See the update to this post.

I’m still learning how to do good espresso, and my current technique seems to generate better, more repeatable results than before.

  1. Let your beans outgas before grinding them

    Inspired, as usual, by a James Hoffmann video, I’ve started doing this much more regularly after noticing that super-fresh-roasted beans keep on resulting in horrible channeling. So now when I get a new bag of beans I put it into my countertop storage and let it sit there while I finish off the previous bag.

    Relatedly, rather than keeping my current beans in an airtight container, I’m actually using the hopper on my grinder instead of single-dosing stuff.

  2. Target 15g of ground espresso

    I’ve settled on a 15-gram dose. Since I’m now using the hopper instead of single-dosing, I’m continuously adjusting my grind timer; I first tare my scale with the dosing cup, then put the dosing cup under the grinder, run it for my set time, then weigh the ground beans and then adjust the timer based on targeting 15 grams (for example, if my grind time is set to 4.5 seconds and I get 13 grams ground, I adjust the timer to \(4.5s \times 15g/13g = 5.19s\)), and then also grind a bit more until I get to 15 grams. If my initial grind was too much I just go ahead and use a larger dose.

  3. Sideways-tap level, then WDT, then sideways-tap again

    I’m no longer using the spinny-spinny leveler, unless I’m having a really difficult time getting the puck level before tamping. I am using a WDT for declumping. I’m still using the crappy WDT but I will someday get around to printing one of the acupuncture-needle ones that everyone’s in love with now.

  4. Calibrated tamper, but go extra

    Instead of trying to get a precise pressure-based tamp, I’m using the calibrated tamper by Decent to indicate the minimum force to pack it down by. Apparently it’s easy to undertamp a puck but pretty much impossible to overtamp, and the depth-based tamping I was doing before was way too inconsistent, especially when using lighter roasts (which tend to grind denser).

    (If you don’t want to pay the premium for the Decent tamper, this one on Amazon looks pretty okay.)

  5. Extract based on time, not ratio

    This is a thing that’s made a huge difference to the quality of my output. Instead of targeting a 1:2 in:out ratio and adjusting the grind to get it closer to 25 seconds, I brew for 25 seconds and then adjust the grind to get it closer to a 1:2 ratio. Extraction time is the primary driver of flavor profile, and a 25-second extraction seems to get pretty close to the peak. So if my grind is too fine I might get a 1:1 ristretto, or if it’s too coarse I might get a 1:3 lungo, but either way I’ll end up with some pretty good-tasting espresso (although a lungo will tend to be a bit more bitter than I like).

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My (current) coffee station

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For the last few months (since mid-July) I’ve been going through a lot of upgrades and troubleshooting on my coffee setup, especially as far as espresso is involved. I’m finally at the point where I’m happy with both the equipment and technique I have… or at least I think I am.

Here are the products I currently use, and the techniques I’ve found to get the most out of them. As usual, I have affiliate links for many of the products on display, but feel free to search for the best deal or the vendors you prefer.

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ESE pod review: Caffe Pompeii Circe 100% Arabica

The Caffe Pompeii Circe (which is labeled as “Gusto” on the pod envelope) is one of the pods that Podhead sent me as a sample. Being fully-caffeinated I was hesitant to drink it (as caffeine hecks me up something fierce), so for the sake of this review I only did a single 16g shot.

This time I used my standard portafilter, so I don’t know whether there was channeling. However, the resulting coffee tasted smooth and well-balanced, and I definitely recommend this one wholeheartedly if you want an ESE pod to brew and don’t have any reason to avoid caffeine.

An hour later I had jitters and a panic attack, as expected. Oh well.

Gusto Decaf Polifemo

When I ordered a bunch of ESE pods for this ongoing ESE pod experiment, PODhead sent me a few samples of a few other pods. This is one of them. Oddly, I couldn’t find this particular one anywhere on their website, although a websearch turned it up, so it’s probably just something weird about their site navigation.

Also, given some of the extraneous slug text on the link, I worry about whether the links will remain active in the long term as their stock changes. If anyone from PODhead wants to let me know about what’s going on with that, it’d be greatly appreciated!

Anyway, they only gave me two pods, so I can only do a two-shot evaluation. For my first shot I went with a lungo, which I managed to get exactly 21g out. Yay me! The shot pulled cleanly and there was no channeling. Some slight bitter notes, maybe a little bit burned, but nothing unpleasant. Good texture. Left behind some sweet notes on my palate.

For my second shot I opted to go with a standard shot, and got 15g out. Just like with the Cremissimo arabica decaf I paradoxically got something more bitter and overextracted. So, this stuff definitely wants a shot on the longer side. It was still decently drinkable though.

This seems like a decent starter espresso for someone who just wants something simple and no-nonsense, and is somewhat forgiving to overextraction. Someone who doesn’t care about the fiddly details of espresso, or extraction ratios or channeling or texture, someone who has never heard of WDT or calibrated tamping or puck prep or any of the debates about 3 bar vs. 9 bar vs. 15 bar.

I used to be like that.

Sometimes I miss those days.

This coffee is fine.