Coffee questions, answered.

Balanced extraction tastes clean, balanced, and complex—not bitter, not sour. The fast way: taste at 18-25 seconds (sour means under-extraction) and at 35+ seconds (bitter means over-extraction). The precise way: measure TDS (total dissolved solids) with a refractometer. Target 18-22% for espresso, 1.2-1.5% for pour-over.

Finer grinds increase surface area, speeding extraction. Coarser grinds slow it down. If your brew tastes sour (under-extracted), go finer. If it tastes bitter (over-extracted), go coarser. Adjust grind before adjusting brew time.

Light roasts extract better at higher temperatures (93-98°C). Dark roasts at lower temperatures (85-92°C). Optimal range for most medium roasts: 90-96°C. Too cold = sour. Too hot = bitter, fast extraction.

Standard ratio is 1:16 (1g coffee to 16g water). Espresso uses 1:2 (18g in, 36g out). Pour-over and immersion brewing vary: 1:15 to 1:17 typical. Experiment within 1:14 to 1:18 range to dial in your preference.

For under $100: Baratza Encore (best value). For $100-300: Wilfa Svart or Baratza Sette (espresso). For $300+: Eureka Mignon or Fellow Ode. Key: burr type (conical > blade), consistency, and grind range for your brewing method.

Yes, if you want repeatability. A scale with 0.1g precision and an integrated timer (Acaia Pearl, Hario V60 scale) is worth the investment. Volumetric scooping is inconsistent across different coffees and origins.

For pour-over: gooseneck kettle for pour control. For precise temperature: electric kettle with temperature display (Fellow Stagg EKG). For immersion: any pot that boils water. Gooseneck is the most versatile single tool.

Ideal window: 5-30 days after roast. Espresso peaks at day 7-14. Filter coffee peaks at day 3-7. After 30 days, flavor drops off but coffee is still drinkable. Store in opaque, airtight containers away from heat and light.

Freezing can preserve beans for 3-6 months if done right: use airtight bags, squeeze out air, freeze whole beans (not ground). Thaw in the freezer overnight. Repeated freeze-thaw cycles damage beans—freeze in smaller portions.