Why is my coffee sour?Sour, sharp or thin coffee is usually under-extracted. Here's how to fix it, step by step, for espresso and pour-over.Why is my coffee bitter?Bitter, dry or harsh coffee is often over-extracted, but not always. How to tell, and what to change for espresso and pour-over.How to dial in espressoA simple, repeatable way to dial in espresso with any grinder: fix the dose, use the grind for time and the ratio for taste.Pour-over grind sizeHow fine to grind for a V60 and other pour-over brewers, how to read the drawdown time, and how paper and dose change it.Learn to dial inHow grinders and extraction work, dial-in guides per method, and a fix for every cup, from coffee creators' videos.RecipesThe creators' recipes for espresso, pour-over, AeroPress, immersion, cold brew and batch.Grind size chartHow fine to grind for every brew method, on popular grinders.Grind settings by grinderWhere to start on your grinder, with sources.
Notchbook is a free app that remembers the grind setting that worked for each coffee, grinder, brew method and filter paper, and keeps a journal of every brew. Get it free on Google Play. The iPhone app is coming soon. More about Notchbook.