🍳 Food & Cooking10 steps

How to Buy Good Beans and Make Great Coffee

Most bad coffee isn't brewed badly — it starts with stale, poorly sourced beans. Learning what to look for when buying and the basics of extraction transforms your morning cup.

Reading time

45 seconds

Achieve in

2 weeks

Steps

The 10 Steps

Buy whole beans, never pre-ground

Coffee loses 60% of its aromatic compounds within 15 minutes of grinding. Pre-ground coffee in a supermarket has been stale for weeks or months. Whole beans stay fresh much longer because the oils and gases are sealed inside. Grind right before you brew.

💡A basic burr grinder costs $30-50 and is the single best upgrade for your coffee.

Why fresh grinding makes all the difference

Look for a roast date — not a best-by date

Quality roasters print the exact roast date on the bag. Coffee is at peak flavour 7-21 days after roasting. Supermarket coffee only shows 'best by' dates 6-12 months out, meaning it was roasted months ago and is already stale when you buy it.

💡If there's no roast date on the bag, it's probably not specialty coffee.

Buy from local roasters or specialty shops

Local roasters turn over inventory weekly. Specialty coffee shops stock beans roasted within the past 2 weeks. Online specialty roasters ship within days of roasting. Supermarket shelves sit for months. Freshness trumps brand.

💡Many roasters offer subscriptions that ship beans right after roasting.

Start with medium roasts from single origins

Medium roasts balance the bean's origin flavour with roast character. Single origins (one farm or region) let you taste distinct flavour profiles — Ethiopian coffees taste like blueberries, Colombian like chocolate. Blends are designed to taste consistent but less interesting.

💡Ask the roaster what flavour notes to expect — good beans have tasting notes on the bag.

Use the right coffee-to-water ratio

The standard starting point is 1:15 to 1:17 — that's 1 gram of coffee to 15-17 grams of water. For a 250ml cup, use about 15-17g of coffee. Too little coffee = weak and sour. Too much = bitter and overwhelming. Use a kitchen scale, not a scoop.

💡Once you find your preferred ratio, it works across all brew methods.

Use water just off the boil — 90-96°C

Boiling water (100°C) extracts too aggressively and burns the coffee. Water below 85°C under-extracts, leaving it sour and thin. Boil your kettle and wait 30-45 seconds, or use a thermometer. The sweet spot is around 93°C.

💡If you don't have a thermometer, 30 seconds off the boil works for most kettles.

Match your grind size to your brew method

Coarse grind (sea salt texture) for French press — long steep time needs big particles. Medium grind (table salt) for pour-over and drip. Fine grind (flour texture) for espresso — short contact time needs more surface area. Wrong grind = wrong extraction.

💡If coffee tastes sour, grind finer. If it's bitter, grind coarser.

Bloom your coffee before full extraction

Fresh coffee releases CO2 when hot water hits it — this is called 'blooming'. Pour just enough water to saturate the grounds (about 2x the coffee weight) and wait 30-45 seconds. This lets gas escape so water can extract evenly during the full pour.

💡If your coffee doesn't bubble during blooming, the beans are probably stale.

Control your total brew time

Pour-over should take 2.5-4 minutes total. French press steeps for 4 minutes before plunging. Espresso extracts in 25-35 seconds. Time is the variable that tells you if your grind is correct — too fast means grind finer, too slow means grind coarser.

💡Use your phone timer every brew until you've dialled in your setup.

Store beans airtight in a cool, dark place

Light, heat, air, and moisture are the enemies of fresh coffee. Keep beans in an opaque, airtight container at room temperature. Don't refrigerate — condensation ruins them. Don't freeze unless you're storing for over a month, and never re-freeze.

💡Buy only what you'll drink in 2-3 weeks to always have fresh coffee.