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Hario Switch 03

Super Hybrid — Double Batch Coarse

Hario Switch 03 Hario switch by Tetsu Kasuya

Tetsu Kasuya's Super Hybrid for the Switch 03 — a coarse-ground hybrid that toggles the valve between immersion and percolation and finishes with a cooler pour. Scaled as a double batch for two.

1:15 Ratio
3:30 Total
30g Dose
90°C Temp
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Parameters

30 g
Coffee
450 g
Water
1:15
Ratio
90 °C
Temp
7 coarse
Grind
3:30
Total
~450 ml
Yield
Grind · 7/10 · medium-coarse
FINE COARSE

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Method

3:30 · total
  1. Bloom 1 / 7
    0:00
    40s

    Close the switch. Pour 70g in a spiral. Let it steep.

    +70g→ 70g Spiral 5.8g/s 12s Valve: Closed 90°C
  2. Pour 2 / 7
    0:40
    50s

    Open the switch. Pour to 180g.

    +110g→ 180g 5.5g/s 20s Valve: Open
  3. Pour 3 / 7
    1:30
    40s

    Pour to 300g.

    +120g→ 300g 5.5g/s 22s Valve: Open
  4. Pour 4 / 7
    2:10
    5s

    Close the switch. Pour the final 150g gently to 450g.

    +150g→ 450g Fill gently 75°C Valve: Closed
  5. Prepare 5 / 7
    2:15
    5s

    Open the switch.

    Valve: Open
  6. Wait 6 / 7
    2:20
    1m10s

    Let the bed draw down completely.

    Valve: Open
  7. Done 7 / 7
    3:30

    Drawdown complete.

Notes

The coarse grind and the lower brewing temperature keep the long immersion from over-extracting, while the cooler final pour adds body without drawing out bitterness. Adjust the grind to land the drawdown near 3:30 total.

Original source

Recipe by Tetsu Kasuya, published at youtube.com.

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