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How-to Guides

Standard operating procedures for brewing: dial-in rules, troubleshooting by taste, measuring extraction, recipes, water preparation, and sanitation protocols. See also: hub, Explanation, Reference.

Best Practices

The Rule of One Variable

When a brew tastes sub-optimal, never change more than one variable at a time. The standard hierarchy of adjustment is: 1. Ratio: Fix the amount of coffee and water first (for example, lock in 1:16 for filter, 1:2 for espresso). 2. Grind Size: This is the primary mechanism for controlling flow rate and extraction. 3. Temperature: Adjust only if the coffee tastes sour (increase temp) or excessively bitter (decrease temp) despite a perfect grind size.

Taste first, measure second

Sour, salty, or thin usually means under-extracted; bitter, dry, or hollow usually means over-extracted or channeled. A refractometer confirms the diagnosis (see Measure TDS and Extraction Yield); targets are in Reference.

Puck Preparation (Espresso)

  1. WDT (Weiss Distribution Technique): Stir the grounds in the portafilter with thin needles (0.3mm–0.4mm) to break up clumps and produce uniform density.
  2. Leveling: Distribute the grounds evenly across the basket.
  3. Tamping: Apply firm, level pressure to remove all void space in the puck. A self-leveling tamper gives a perfectly flat bed and mitigates channeling.

Pour-over Agitation

Agitation (turbulence) increases extraction. - Pouring from higher up, or in aggressive circles, increases agitation. This can increase sweetness but also risks astringency. - Gentle, low pours minimize agitation. The result is a cleaner, tea-like cup. - Using a tool to excavate the bloom makes sure that all grounds are wet immediately.

Troubleshooting

Espresso Diagnosis

  • Under-extracted (Fast Flow): Tastes sharp, sour, salty, or empty. The shot probably pulled in under 20 seconds.
  • Fix: Grind finer to increase resistance and slow the flow down.
  • Over-extracted (Slow Flow): Tastes intensely bitter, dry, or astringent (leaves a rough feeling on the tongue). The shot likely took over 40 seconds.
  • Fix: Grind coarser to decrease resistance and speed up the flow.
  • Channeling: The shot sprays uncontrollably or blondes very early. Tastes simultaneously sour and bitter.
  • Fix: Improve puck preparation (WDT, level tamp).

Filter Diagnosis

  • Drawdown too slow: The filter clogs and takes >4 minutes. Tastes muddy and bitter.
  • Fix: Grind coarser, or use a paper filter with faster flow characteristics (for example, CAFEC T-90).
  • Drawdown too fast: Water rushes through in <2 minutes. Tastes weak and sour.
  • Fix: Grind finer.
  • Astringency: This is dryness on the palate, often caused by channeling or excessive agitation.
  • Fix: Pour more gently, lower the kettle, or grind slightly coarser to reduce fines migration.

Measure TDS and Extraction Yield

A refractometer turns "tastes sour" into a number you can compare between brews.

  1. Brew as usual and weigh the beverage (for pour-over, weigh the server after drawdown; for espresso, the cup).
  2. Stir the beverage, draw a small sample with a pipette, and let it cool to room temperature (or use the meter's temperature compensation).
  3. Zero the refractometer with the same water you brewed with, then read the sample's TDS %.
  4. Calculate extraction yield: EY % = beverage mass (g) x TDS % / dose (g).
  5. Plot TDS against EY on a control chart and change one variable (grind first) toward your target.
Filter example:   15 g dose, 220 g beverage, TDS 1.35%  -> EY = 220 x 1.35 / 15 = 19.8%
Espresso example: 20 g dose, 40 g beverage, TDS 9.0%    -> EY = 40 x 9.0 / 20  = 18.0%

Formulas and standard targets are listed in Reference.

Commands & Recipes

1. The NiR Baseline Filter Recipe

A versatile starting point for any pour-over dripper (Hario V60, Kalita Wave, Orea). Steps follow the current NiR brew guide (checked 2026-09-28 via search listing).

Dose: 15g, medium-fine (slightly finer if using ULF burrs)
Water: 250g total (Ratio about 1:16.7)
Pouring ends: about 2:00

1. Rinse paper filter with hot water; discard rinse water.
2. Add 15g coffee.
3. 0:00 - Bloom: Pour 45g water and stir gently. Wait 45s.
4. 0:45 - Pour the remaining 205g in 4 pours of about 51g, spaced evenly so the last pour ends around 2:00.
5. Let the bed draw down completely.

2. The 5-Pour High Extraction Recipe (Ultra-Light Roasts)

Used for highly dense, ultra-light imported coffees that resist extraction.

Dose: 15g
Yield: 250g
Water: 95°C+
Time: 3:00 – 4:00

1. Bloom: 50g water at 0:00.
2. Pour 1: 50g water at 0:45 (Total: 100g).
3. Pour 2: 50g water at 1:30 (Total: 150g).
4. Pour 3: 50g water at 2:15 (Total: 200g).
5. Pour 4: 50g water at 3:00 (Total: 250g).

3. The NiR Baseline Espresso Recipe

Designed for a Modbar EP or any high-end temperature-stable machine.

Dose: 20g
Yield: 40g (Ratio 1:2)
Water: 93°C (~40ppm)
Time: 25–35 seconds total

1. Grind 20g into portafilter (use an espresso-capable burr such as SSP HU, SSP MP, or a conical; not a filter-only set such as the Weber DB-2 Ultra).
2. WDT, distribute, and tamp evenly.
3. Initiate shot. If machine supports it, apply a 3-5 second pre-infusion at line pressure.
4. Ramp to 9 bar.
5. Stop the shot when scale reads 38g (it will drip to 40g).
6. Taste: Adjust grind finer if sour/fast, coarser if bitter/slow.

4. High-Clarity "Turbo" Espresso

A modern approach using low-fines burrs (for example SSP MP) and light roasts to maximise clarity while minimising channeling. It follows the finding of Cameron et al. (Matter, 2020) that a lower dose, coarser grind, and shorter shot can reach the same or higher extraction yield with less variation. The exact parameters below are community practice, not from the paper.

Dose: 15g
Yield: 45g (Ratio 1:3)
Pressure: ~6 bar (requires an adjustable OPV or a profiling machine)
Time: ~10–20 seconds

1. Grind coarser than traditional espresso.
2. Prep puck as normal.
3. Pull shot at lower pressure (6 bar) to prevent puck compression.
4. The shot flows quickly and looks thin. When dialled in, the cup is sweet and clear with less of the bitterness that channeling causes in long 9-bar shots.

5. Water Remineralization Concentrate (SCA-Target Water)

Two single-salt concentrates (the Barista Hustle method) let you build any hardness and alkalinity from distilled or RO water. Each concentrate is 1000 ppm as CaCO3, so 1 g of concentrate in 1 L of finished water adds 1 ppm.

Concentrate A (GH, magnesium): 2.45 g Epsom salt (MgSO4·7H2O) in 1 L distilled water
Concentrate B (KH, buffer):    1.68 g baking soda (NaHCO3) in 1 L distilled water

SCA-target water (GH 68 / KH 40), 1 L:
  68 g concentrate A + 40 g concentrate B + 892 g distilled/RO water

SCA-target water, 1 US gallon (3.785 L):
  257 g concentrate A + 151 g concentrate B, top up to 3.785 L with distilled/RO water

Corrected recipe

An earlier version of this note used 1.5 g Epsom salt and 0.5 g baking soda per litre of concentrate, with 100 ml per gallon, and claimed about 80 ppm hardness and 40 ppm alkalinity. By molar mass that mix gives only about 16 ppm GH and 8 ppm KH as CaCO3. It was also labelled "SCA Standard", but the SCA publishes target values, not a salt recipe.

Notes:

  • The SCA specifies calcium hardness; this recipe reaches the same GH with magnesium. Swap part of concentrate A for a calcium chloride concentrate (1.47 g CaCl2·2H2O per litre) if you want calcium, but chloride is corrosive in espresso boilers.
  • Baking soda at KH 40 adds about 18 mg/L sodium, above the SCA 10 mg/L target. Potassium bicarbonate (2.00 g KHCO3 per litre for 1000 ppm) avoids the sodium.
  • For espresso machines, follow the manufacturer's water specification over any recipe.
  • Salt quantities are in Reference.

6. Freezing & Portioning Protocol

To freeze fresh coffee effectively:

1. Rest the bag at room temperature for 10 days (espresso) or 14 days (filter).
2. Place single centrifuge tubes or vacuum-seal bags on a scale.
3. Dose exactly 15.0g (or your preferred dose) into each.
4. Seal tightly to prevent moisture ingress.
5. Label with Bean Name, Roast Date, and Target Dose.
6. Store in the deepest part of the freezer (avoid the door).
7. When brewing, grind straight from frozen (colder beans also grind finer and more evenly). Do not open a cold container in warm, humid air and put it back; condensation forms on the beans.

7. Published Reference Recipes

Well-known recipes from competition baristas and educators. They are useful cross-checks for the NiR baselines. Parameters are as the named authors published them in their videos and guides.

Tetsu Kasuya "4:6" pour-over (2016 World Brewers Cup champion)
  20 g coarse-ground coffee, 300 g water (1:15), five pours of 60 g about every 45 s
  First 40% (pours 1-2): shift the split to tune sweetness vs acidity
  Last 60% (pours 3-5): fewer, larger pours = lighter, more pours = stronger
  Drawdown finishes around 3:30

James Hoffmann "Ultimate V60" (2019)
  30 g coffee, 500 g water (1:16.7), water just off the boil for light roasts
  0:00 bloom with 60 g (2x dose), swirl, wait 45 s
  Pour to 300 g (60%) by 1:15, then to 500 g by 1:45
  Gently stir, then swirl to flatten the bed; drawdown by ~3:30

James Hoffmann French press
  30 g coarse coffee, 500 g water just off the boil
  Steep 4 min, stir the crust, skim foam and floating grounds
  Wait another 5-8 min, press only to the surface, pour gently

Storage, Sanitation, and Maintenance Protocols

Access Control: Storage Protocols

To secure the beans against the four threat vectors (see Explanation): - Daily Access: Keep beans in an airtight, opaque container (like an Airscape or Fellow Atmos) at stable room temperature. Never store them in a fridge, where they will absorb food odors and condensation. - Long-Term Storage (Freezing): Freezing greatly slows staling (it does not stop it). To prevent moisture damage from condensation, seal the beans airtight in single doses (vacuum bags or sealed tubes). - The Golden Rule of Freezing: Grind the beans immediately after you remove them from the freezer, while still frozen. Never open a frozen bag, let it warm up, and return it to the freezer; condensation on the cold beans damages the batch.

Grinder Sanitation

Coffee oils coat the burrs and grinding chamber over time. As these oils oxidize, they impart a bitter, stale taste to all subsequent brews. They completely mask the terroir of high-quality beans. - Daily: Purge the grinder by pulsing it empty. Use a bellows (if equipped) to blow out retained grounds. Brush the exit chute. - Weekly/Monthly: Disassemble the burr carrier and vacuum the chamber. Clean the burrs with a stiff brush or wooden toothpick. - Warning: Do NOT use water. It causes the steel burrs to rust rapidly. Grinder-cleaning tablets (for example Urnex Grindz) can absorb built-up oils when you must deep clean without disassembly; check that your grinder's maker allows them.

Espresso Machine Backflushing

The 3-way solenoid valve in an espresso machine vents the pressure above the puck to the drip tray at the end of every shot, and some coffee liquid and fines are drawn back into the group and valve path. If you do not flush them out, the baked-on residue taints future extractions.

Only backflush machines with a 3-way valve

Backflushing a machine without a 3-way solenoid (many entry-level machines) has nowhere to vent the pressure. Check the manual first.

  • Daily (Water Backflush): Put a blind basket (no holes) into the portafilter and run the pump for 5 seconds, then release. Do the cycle again 5 times to flush loose grounds out of the group head and valve. Wipe the shower screen with a damp cloth.
  • Weekly (Chemical Backflush): Use a specialized espresso machine detergent (like Cafiza). Place half a teaspoon in the blind basket. Run the pump for 5 seconds, rest for 5 seconds. Do the cycle again 5 times. Then, remove the portafilter, rinse thoroughly, and repeat the backflush cycle with water only to remove all chemical residue. Finally, pull and discard a "seasoning" shot.

Steam Wand Purging and Dairy Safety

Milk residue baked onto the inside of a hot steam wand is a significant food safety hazard. It provides an ideal environment for bacterial growth and milk spoilage. - Protocol: Immediately after steaming milk, wipe the wand with a dedicated damp cloth (never the cloth for the drip tray). Then purge the wand: blast steam for 2 seconds to expel milk sucked up inside the tip. Do this every time, without exception. - Deep Cleaning: Once a week, soak the steam wand tip in Rinza (or a similar dairy cleaner) diluted with water to break down any calcified milk proteins blocking the steam holes.

Electrical Safety

Before installing a commercial machine, confirm its supply requirements (voltage, phase, breaker size) with an electrician; the hazards are described in Explanation.

Sources