A Zerno Z1 Review & A Grand Universal Theory Of Coffee Grinding

James Hoffmann March 21, 2025
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James Hoffmann

@jameshoffmann

About

Hi! My name is James, and I make videos about anything and everything to do with coffee, occasionally food and sometimes business/entrepreneurship. I create how-tos, guides, reviews, vlogs, video essays and mini-documentary films. In the real world, I've started a few companies, I wrote "The World Atlas of Coffee" and "How To Make The Best Coffee At Home". I do a little advisory work for startups too. If you want to get in touch, drop me a line but please read these two things first: 1. I don't do paid reviews. I have a Patreon that helps me buy the products I want to review to prevent bias (then I give them away!) 2. I get a lot of email, so sadly I can't help with queries about which equipment you should buy. TO GET IN TOUCH PLEASE REACH OUT VIA WEBSITE: https://www.jameshoffmann.co.uk/contact-me Management: Ziggurat XYZ

Video Description

Timestamps 0:00 How To Approach Choosing Coffee Grinders To Review 02:23 What I Really Like About This Grinder 05:18 A Small Aside on Burrs 06:30 The Interesting Auger / Prebreaker Piece 07:50 Grind Retention Performance 10:57 Sound Quality, Making An Espresso With It, & Tasting Segment (if you even care) 12:06 What I Don't Love About This Grinder 16:37 The Grand Unified Theory of Grinding 17:02 The Path Of Coffee Through To The Burrs 17:38 Regrinding and The Problems It causes 19:05 Moving The Bottleneck 19:59 Single Bean Feeding vs Slow Auger 26:09 Who Is This Grinder For? 28:48 Appreciation For My Patreon The Zerno website: https://zerno.co The Fresh Coffee print that's in the background: https://geni.us/THT-FreshCoffee The Coffee Joy print in the background: https://geni.us/THT-Joy Other Links: Patreon: https://www.patreon.com/jameshoffmann Limited Edition Merch: https://geni.us/TensHundredsThousands Instagram: https://www.instagram.com/jimseven Twitter: https://www.twitter.com/jimseven My Books: How to Make The Best Coffee At Home*: https://geni.us/howtomakethebestcoffee The World Atlas of Coffee*: http://geni.us/atlasofcoffee The World Atlas of Coffee Audiobook*: https://bit.ly/worldatlasofcoffeeaudio The Best of Jimseven*: https://geni.us/bestofjimseven Things I use and like: My old glasses: http://bit.ly/boldlondon My new glasses (Sept 2024 onwards): https://bit.ly/thenewglasses My hair product of choice*: https://geni.us/forthehair (*Affiliate links which may earn us a commission)