Pour-Over Dial-In Lab
A systematic, taste-driven troubleshooting framework based on Lance Hedrick's dial-in masterclass.
Lance's 4 Golden Rules of Dialing In
1. Time is a Symptom
Brew time is an output, never a goal. Never adjust your grind just to hit an arbitrary 3:00 minute clock. If it tastes sweet and clean at 2:15 or 4:10, it is dialed in.
2. Lock Your Foundation
Keep your dose (15g/20g), ratio (1:16), water, and pour structure constant. Change only grind size first to isolate cause and effect.
3. Astringency ≠ Bitter
Bitterness is a flavor (ashy/dark). Astringency is a tactile sensation (chalky, tongue-drying sandpaper) caused by channeling from grinding too fine or over-swirling.
4. Evaluate As It Cools
Boiling hot coffee burns taste receptors and hides defects. The true extraction clarity, sweetness, and faults emerge between 50°C and 60°C.
How Did Your Cup Taste?
Click your primary sensory impression to reveal Lance's recommended single-variable adjustment for Brew #2.
Under-Extracted Cup
Organic acids extract first and fastest. If you haven't extracted enough sweet caramelized sugars to balance them, the cup tastes sharp, sour, and hollow.
The Two-Pour Technique
Lance champions a simplified two-pour structure: 3x Bloom + Single Continuous Pour. Fewer pours mean fewer turbulence disruptions, less fines migration, and predictable laminar extraction.
3x dose water + gentle swirl or excavation 45 g
Single continuous pour in concentric spirals at low height Pour to 240 g
Single gentle swirl to wash down walls and flatten bed Hands off
⏱️ Two-Pour Timer
Phase SyncRoast Level Baseline Settings
These are initial setup suggestions before dialing in. Your sensory evaluation always takes precedence over these starting baselines.
Dense, lightly roasted cells need high thermal energy to yield solubles.
Slightly wider ratio provides dilution to separate delicate floral/fruit acids.
Start fine; back off if astringency or bed stalling occurs.
Laminar circular pour; gentle swirl at bloom and drawdown.
📓 Iterative Dial-In Log
Record consecutive brew adjustments until you find the sweet spot. Saved in your browser's local storage.
Why Astringency Happens: The Channelling Trap ▼
Many brewers try to increase extraction by grinding finer and finer. Beyond a certain threshold, the microscopic fines clog the filter paper pores, creating localized choke points.
Water always follows the path of least resistance. It carves tiny fissures ("channels") through the coffee bed, rushing through those micro-channels at high velocity while bypassing the rest of the bed.
The result: The channeled grounds are brutally over-extracted (yielding harsh astringency and dryness), while the bypassed grounds are under-extracted (yielding sourness). The cup tastes dry, sour, and empty at the same time.
The fix: Coarsen your grind setting by 1–2 clicks to restore uniform laminar percolation.
Why Brew Time is NOT a Dial-In Target ▼
A classic myth in pour-over is that every brew must finish within 2:30 or 3:00 minutes. Lance repeatedly emphasizes that drawdown time depends heavily on coffee density, processing method (washed vs natural), grinder burr geometry (fines generation), and filter paper porosity.
A dense Ethiopian heirloom ground on flat burrs might finish at 3:45 and taste like sweet jasmine and peach nectar with zero astringency. If you coarsened the grind just to force the timer to 2:45, the coffee would taste sour, hollow, and underdeveloped.
Always trust your palate: If it tastes sweet and clean, the time is right.