⚡ Pressurized Extraction & Modern Recipes

Espresso Extraction Lab

Master dialing in fundamentals, puck prep fluid dynamics, and explore high-ratio modern shot recipes based on Lance Hedrick's guides.

← Switch to Coffee Hub (Pour-Over vs. Espresso)
Step 1: The Foundation

Espresso Dial-In Basics

Lance Hedrick's 3-step variable isolation hierarchy. Learn how to calibrate standard espresso before moving to specialty recipes.

1. Fixed Dose (In)
18.0 g

Determined by your basket capacity (18g double basket). Never adjust dose while dialing.

2. Target Yield (Out)
36.0 g

1:2 baseline ratio. Always manually stop your scale when it hits your target yield.

3. Target Time Window
25 – 30 s

Diagnostic benchmark. If flow hits 36g in 27s, your flow resistance is calibrated.

4. Primary Adjustment
Grind Size

The only variable you touch to move brew time into the 25–30s window.

🛡️ Puck Prep Checklist (Channel Prevention)

At 9 bar pressure (~130 PSI), water aggressively finds the path of least resistance. Micro-channelling ruins dial-in by creating simultaneous sourness and harsh astringency.

•
Dosing Funnel: Prevents grounds overflow and ensures clean basket edges before distribution.
•
Deep WDT (0.35mm needles): Stir down to the basket bottom in concentric circles to break electrostatic clumps.
•
Gentle Tap & Flat Level Tamp: One vertical tap on the mat to settle the bed, followed by a flat, level tamp. (You cannot "over-tamp").

⏱️ Flow Rate Diagnostics (25–30s Window)

Extraction time is an indicator of flow resistance. Use 25–30s as a baseline guideline, not an inflexible dogma:

Under 20s (Gushing / Fast Flow)
Flow resistance too low. Sour, salty, thin, underdeveloped flavors.
→ Grind Finer
Over 35s (Choked / Dripping Flow)
Flow resistance excessive. Bitter, astringent, dry sandpaper tongue feel.
→ Grind Coarser
Fast Time + Bitter & Dry Astringency
Severe channelling! High pressure carving cracks through un-WDT'd puck.
→ Fix WDT Prep

2. Modern Espresso Recipes & Relative Grind Shift

Based on Lance Hedrick's recipe deep-dive. Each style changes ratio, target contact time, and specifically grind size relative to your dialed-in standard espresso baseline.

Baseline Basket Dose:
18.0g

Normale (Standard Espresso)

Ratio: 1:2 (18.0g in → 36.0g out)
Standard Reference
Grind Size Relative to Dialed Standard Espresso: ±0 Baseline (Dialed)
-2 Finer Baseline +4 Coarser +10 Coarser
Dose In
18.0 g
Target Yield
36.0 g
Target Time
25 – 30 s
Pressure Profile
9 bar
Flavor Profile: Balanced concentration of oils, aromatics, and caramelized sugars with velvety crema.
Lance's Brewing Insight: Always dial this in first with your bean before attempting higher ratio modern shots.

⏱️ Shot Extraction Timer

Target: 25-30s

Time your shot from the moment pump activation begins until you cut the flow.

00.0
Ready to Pull

📓 Espresso Dial-In Log

The Turbo Shot: Why Coarser & Faster Extracts More ▼

The Turbo Shot was mathematically modeled by Dr. Christopher Hendon and coffee researcher Michael Cameron, and widely popularized by Lance Hedrick. Traditional wisdom held that grinding finer always yields higher extraction.

However, once you grind finer than a critical threshold, uneven flow, local compaction, and fines clogging create micro-channels. Much of the bed is left under-extracted while the channels are over-extracted.

By grinding significantly coarser (+3 to +5 clicks) and pulling at 6 bars of pressure for 12–16 seconds at a 1:2.5 to 1:3 ratio, water flows uniformly through every single ground particle. The result is a shot with zero astringency, stunning fruit sweetness, and an extraordinary 22%–24% extraction yield.

Allongé & Sprover: Extending the Espresso Machine into Filter Territory ▼

The Allongé (1:4 to 1:5 ratio) was popularized in Montreal by Scott Rao. Grinding coarser than standard espresso allows a long shot volume (e.g. 70g–90g out from 18g) without astringency. It highlights sparkling acidity and nuanced aromatics in ultra-light specialty coffees.

The Sprover (1:10 to 1:12 ratio) pushes this to the extreme: using an espresso machine to brew a full filter-strength beverage in 45–60 seconds. Because the grind is much coarser (fine filter territory) and flow is gentle (often with low pressure or paper filters placed above/below the puck), you get pour-over clarity married with rich espresso sweetness and delicate micro-crema.