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Every coffee question we have answered, from brewing and beans to grinders, gear and coffee drinks, newest first.

Why Does Coffee Taste Stale?

Coffee goes stale through oxidation when beans or grounds are exposed to air, heat and light. How to store coffee so it stays fresh.

A cortado is a Spanish espresso drink made with equal parts espresso and steamed milk. Here's how it tastes and how to make one at home.

Twelve pour-over coffee mistakes to avoid, like grinding too early, using old beans, pouring off the bed and brewing too long.

White coffee isn't a flat white. It's made from lightly roasted beans. Here's how to grind, brew and flavor white coffee at home.

Burnt-tasting coffee usually comes from over-roasted beans, stale grounds, over-extraction or a dirty machine. How to fix each one.

Don't brew coffee with boiling water. It over-extracts the grounds and tastes bitter. Aim for 195 to 205°F instead.

Espresso powder vs. instant coffee: espresso powder is stronger and richer, with more caffeine. Here's when to use each one.

Do K-Cups need to be refrigerated? No. Keurig says to store them at room temperature. Here's how to keep pods fresh longer.

Ten easy ways to flavor your coffee at home, from condensed milk, cinnamon and cocoa to butter, coconut milk, ice cream and a pinch of salt.

Sour coffee usually means stale or under-roasted beans or under-extraction. Six causes and how to fix each one.

Salty coffee is usually under-extracted: too little water, too coarse a grind or too short a brew. How to fix it.

How to tell if coffee beans have gone bad: check the roast and expiration dates, try the zip-bag test and give them a sniff.