Coffee Emergency: A Quick Cheat Sheet for Ratios, Grinding, and Time
Pawel Horzela
You’re standing in the kitchen, the water in the kettle is already humming, and suddenly your mind goes blank: How much do I pour? Don’t worry, we’ve all been there. Instead of flipping through thick manuals, use this short cheat sheet to help you master the chaos of your morning brew.
⚖️ 1. Ratios
The specialty golden standard is 6g of coffee for every 100ml of water. This is your base – if the coffee is too strong or too weak, start by adjusting up or down by 0.5g.
| I want to brew: | How many grams of coffee? |
|---|---|
| A cup (150 ml) | 9 g |
| Standard mug (250 ml) | 15 g |
| Large mug / AeroPress (300 ml) | 18 g |
| Drip V60 / Server (500 ml) | 30 g |
⚙️ 2. Grinding and Time
Grind size is your most important flavor "slider." Visually compare the grounds to products from your kitchen cupboard.
| Method | Grind size | Brewing time |
|---|---|---|
| Moka Pot | Fine (table salt) | Until light foam appears |
| AeroPress | Fine / Medium | 1:45 – 2:15 min |
| Drip V60 | Medium (granulated sugar) | 2:30 – 3:15 min |
| French Press | Coarse (sea salt) | 4:00 min + 5 min waiting |
💧 3. Water and Temperature
Remember: boiling water is the enemy of sweetness.
- Water: Always filtered (Brita/Dafi pitcher or spring water).
- Temperature:
- Light roast (fruity, citrusy): 93°C – 96°C / 199°F – 205°F (wait about 1 min after boiling).
- Dark roast (nutty, chocolatey): 88°C – 92°C / 190°F – 198°F (wait about 3 min after boiling).
🔍 4. Quick Flavor Diagnosis
The coffee is in your mug, you take the first sip and... something’s off? Correct it on your next attempt:
| What do you taste? | Diagnosis | Solution |
|---|---|---|
| Very sour, salty | Under-extracted | Grind finer / hotter water |
| Bitter, dry, ashy | Over-extracted | Grind coarser / cooler water |
| Watery, "sad" | Not enough coffee | Add 1-2g more coffee |
| Too intense, heavy | Too much coffee | Use a bit more water (dilute) |
| Paper, metal, cupboard | Hygiene / Water | Rinse the filter, wash the seals |
💡 Golden rule: Only one variable!
This is the key to success in specialty coffee. If you don't like the coffee, change only one thing at a time (e.g., only the grind size). If you change the grind, temperature, and ratio all at once, you’ll never know what actually fixed the flavor.
👉 Want to go deeper? Check out our guide: Beginner's Path.