Percolate
Field-tested references for specialty coffee drinkers.
Bypass brewing means adding water after extraction to control strength without changing flavor. Here's how it works, when to use it, and starting ratios for every brewer.
Light roast doesn't automatically have more caffeine than dark. The real answer depends on how you measure. Here's the science, the myth, and what actually matters.
Single origin highlights one farm's distinct flavor; blends deliver consistent balance. Here's exactly which to choose based on your brew method, taste, and goals.
Pre-infusion gently saturates your coffee puck at low pressure before full extraction. Learn how it works, how long it should last, and whether your machine does it.
Coffee terroir is the combination of soil, altitude, climate, and farming that shapes how a bean tastes. Here's what it means and why it matters for your cup.
Hard or soft tap water changes how your coffee extracts and tastes. Learn what TDS, calcium, magnesium & alkalinity do to your cup, and how to fix bad brew water.
Carbonic maceration seals whole coffee cherries in CO₂-filled tanks, triggering inside-out fermentation. Learn what it tastes like and how to brew it.
Anaerobic coffee is fermented without oxygen in sealed tanks, producing bold fruity, wine-like, or floral flavors. Here's how it works and what to expect in the cup.
Decaf is not caffeine-free — it still has 2–15 mg per cup. Learn how Swiss Water, CO₂, and solvent methods work, and which decaffeination process preserves the most flavor.
Specialty coffee beans peak at 7–21 days post-roast and hold flavor for 4–6 weeks. Learn what the roast date means, how it differs from best-by, and when beans go stale.
Coffee body is the tactile weight and texture you feel in your mouth when you sip — not flavor, not strength. Here's what creates it and how to taste it.
Roast date, origin, process, altitude, varietal, tasting notes, certifications — here's exactly what every field on a specialty coffee bag label tells you before you brew.
Arabica is sweeter and more complex; robusta is bolder and higher in caffeine. Learn how species, taste, caffeine, and growing conditions affect your cup.
Acidity and bitterness are not the same thing. Learn what causes each, how to tell them apart in the cup, and exactly how to dial in your brew.
Yes, it matters enormously. A burr grinder crushes beans to a uniform size for balanced flavor; a blade grinder chops unevenly, causing bitter or sour cups. Here's what to know.
Coffee degassing is when freshly roasted beans release CO₂. Learn why it matters, how long to wait by roast and brew method, and what the valve on your bag actually does.
Tasting notes on a coffee bag aren't added flavors — they're natural compounds in the bean. Learn what citrus, chocolate, and floral really mean and how to find them.
Espresso channeling ruins shots by forcing water through weak puck spots. Learn what causes it, how to spot it, and the exact puck-prep steps to fix it for good.
Extraction yield is the % of coffee solubles in your cup. Learn what TDS and EY mean, the 18–22% target, and how to fix sour or bitter brews at home.
Yes — freezing coffee beans works, but only with the right method. Learn how to portion, seal, thaw, and get better grind results from frozen beans.
Bourbon, Gesha, SL28, Caturra — decoded. Learn what coffee varieties mean, how each one tastes, and how to use variety to choose your next bag.
The ideal brew water temperature is 195–205°F (90–96°C)—but light roasts need the higher end and dark roasts do best a few degrees cooler. Full guide inside.
Higher altitude means slower bean growth, denser beans, and more complex flavor. Learn how MASL numbers on your coffee bag predict what's in your cup.
The right coffee-to-water ratio is 1:15–1:17 for most home methods. Learn exact grams by brew method, how ratio shapes flavor, and when to adjust.
Coffee bloom is the CO₂ release that happens when hot water hits fresh grounds. Learn why it improves flavor, how long to wait, and what a weak bloom reveals.
The right coffee grind size depends on your brew method. Get the complete chart—espresso to cold brew—plus why grind size changes the flavor in your cup.
Fresh-roasted coffee needs rest before brewing. Light roasts: 7–14 days. Dark roasts: 3–5 days. Espresso: up to 21 days. Learn why CO₂ off-gassing matters and how to read the bloom.
Keep specialty coffee tasting its best: store beans in an airtight, opaque container in a cool dark spot and use within 2–4 weeks of roast. Full guide inside.
Ethiopia tastes nothing like Sumatra. Learn how growing origin shapes coffee flavor, with a country-by-country guide to help you choose your next bag.
Light, medium, and dark roast explained, how roast level changes acidity, body, sweetness, and flavor, plus how to read a roast on the bag.
A practical guide to cupping coffee at home, evaluate aroma, acidity, body, and flavor on a structured scale and build a reliable taste profile.
How washed, natural, and honey processing change a coffee's acidity, body, and fruit, and how to read the process on the bag.