How-to Guides¶

Standard operating procedures for brewing: dial-in rules, troubleshooting by taste, recipes, and the 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.

Puck Preparation (Espresso)¶

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.
Leveling: Distribute the grounds evenly across the basket.
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.

Commands & Recipes¶

1. The NiR Baseline Filter Recipe¶

A versatile starting point for any pour-over dripper (Hario V60, Kalita Wave, Orea).

Dose: 15g
Yield: 225g – 250g (Ratio 1:15 to 1:17)
Water: 90–93°C (Cleo or RO at ~11ppm)
Time: 2:30 – 3:30

1. Rinse paper filter with hot water; discard rinse water.
2. Add 15g medium-fine coffee (slightly finer if using ULF burrs).
3. 0:00 - Bloom: Pour 45g water, gently excavate with WDT or swirl. Wait 45s.
4. 0:45 - Pour 2: Pour up to 105g in steady circles.
5. 1:15 - Pour 3: Pour up to 165g in steady circles.
6. 1:45 - Pour 4: Pour up to 225g. Give a gentle spin to level the bed.
7. Allow to draw down completely by 2:30-3:30.

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 (avoid ULF burrs; use standard SSP HU/Weber ULF or conical).
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 SSP MP burrs and light roasts to maximize fruit and clarity while minimizing channeling.

Dose: 15g
Yield: 45g (Ratio 1:3)
Pressure: 6 bar (requires machine adjustment)
Time: 15–20 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 will flow very quickly and look thin, but the resulting cup will be incredibly sweet and complex, bypassing the bitter compounds extracted in long 9-bar shots.

5. Water Remineralization Concentrate (SCA Standard)¶

A recipe to create a mineral concentrate to add to 1 Gallon of pure RO or distilled water.

Epsom Salt (Magnesium Sulfate): 1.5g
Baking Soda (Sodium Bicarbonate): 0.5g
Distilled/RO Water (Concentrate Base): 1 Liter

1. Dissolve the Epsom Salt and Baking Soda completely in the 1 Liter of water. This is your concentrate.
2. To brew: Add 100ml of this concentrate to 1 Gallon of pure RO water.
3. This yields approximately 80ppm total hardness and 40ppm alkalinity.

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. Do NOT let it thaw (condensation will ruin the beans).

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 halts the aging process. But to prevent moisture damage (condensation), you must vacuum-seal the beans in single doses. - 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 thaw, and return it to the freezer. Condensation will ruin the batch instantly.

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. Use Urnex Grindz (food-safe cleaning tablets) to absorb built-up oils when you must deep clean without disassembly.

Espresso Machine Backflushing¶

The 3-way solenoid valve in an espresso machine relieves pressure by sucking a small amount of coffee back into the machine after every shot. If you do not flush it, this baked-on coffee ruins future extractions. - 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 and Thermal Stability¶

Espresso machines consume massive amounts of power to maintain thermal stability. - Voltage Requirements: Most commercial machines require dedicated 220V lines. Running these on inadequate circuits poses a severe fire risk. - Thermal Interlocks: Modern PID controllers have high-limit thermal switches. They cut power to the boiler elements if the water level drops too low. This prevents catastrophic meltdown of the heating element.