Coffee Knowledge
Latest articles, industry insights and brewing guides
How to Drink Coffee While Cycling: New Frame Solution
A new aluminum and rubber frame holds your coffee securely while biking. Available in six colors to match your ride.
How to Brew Coffee with a Siphon (Syphon) Maker
Learn how the siphon coffee maker works, what it tastes like, and how to brew balanced coffee with precise temperature and technique.
Al's Rule for Perfect Espresso Extraction
Al Critzer’s espresso extraction rule uses 30cc in 30 seconds as a baseline, adjusting time for volume to hit the sweet spot.
What You Should Know About Boiler Water in Espresso Machines
Using boiler water from your espresso machine for tea, cleaning, or drinking can pose health risks and harm your machine over time.
13 Practical Uses for Coffee Beyond Drinking
From pain relief to furniture repair, discover 13 surprising ways to use coffee around the house, backed by real results and simple steps.
What Is Coffee Leaf Rust and Why It Matters
Coffee leaf rust is a deadly fungal disease devastating Central American farms. Learn how it spreads, why it’s worse now, and its global impact.
How to Make Ice Drip Coffee at Home
Learn how to brew smooth, low-acid ice drip coffee with a 40–50 drops/minute flow rate over 5–8 hours for best results.
How Espresso Machines Changed Coffee History
Learn how the first espresso machine in 1901 transformed coffee culture and why espresso quality still depends on your machine today.
6 Common Myths About Drinking Coffee Debunked
Learn the truth behind six widely believed misconceptions about coffee, including addiction, sleep, health risks, and effects on kids.
What Is a Variable Pressure Espresso Machine?
Learn what true variable pressure means in espresso machines, which models deliver it, and why some popular machines aren’t truly variable.
The Science Behind Coffee Taste Maps
Learn how traditional Western and Eastern taste models define flavor perception in coffee, including the debate over umami and 'spiciness.'
How Coffee Is Classified: Black, Specialty, Espresso & More
Learn how coffee is categorized into black, espresso-based, and flavored styles — and where terms like espresso and cappuccino truly fit.
Common Coffee Brewing Ratios Explained
Find the standard coffee-to-water ratios for espresso, pour-over, French press, and more. This guide shows exact numbers used by specialty roasters.
Caffeine and Calories in Popular Drinks Compared
Find out how much caffeine and calories are in your favorite drinks, including plain coffee, and why added sugars and creamers add empty calories.
How to Spot Fake Coffee Seeds Online
Not all ‘coffee seeds’ for sale online are real. Here’s how to tell the difference between coffee seeds and common lookalikes like cassia seeds.
How Greek and Turkish Coffee Divination Really Works
Learn how to read coffee grounds after drinking Greek or Turkish coffee, including patterns, meanings, and the full 5-step fortune-telling ritual.
Can Black Coffee Predict the Weather? Try This Bubble Test
Drop a sugar cube into black coffee and watch the bubbles. Their location reveals whether rain is coming or skies will clear.
Do Coffee Beans Have Genders? Debunking the Myth of Male and Female Beans
Coffee beans don’t have genders — but some, called peaberries, develop uniquely. Here’s what really causes them and why they’re prized.
How Coffee Extraction Works: Methods & Science
All coffee brewing relies on three core steps: grinding, soaking, and filtering. Here’s how pressure and time split methods like espresso and immersion.
How Coffee Beans Are Graded Around the World
Coffee grading varies by country—learn how size, defects, altitude, and processing define bean quality, and what terms like SHB and EP really mean.