Open Bloom

Hario Switch 02 Hario switch by brewnotes.co

Shared by Brew Notes, this Hario Switch method blooms with the valve open, then closes for the main immersion before final drawdown. Early percolation sharpens definition, while the held phase develops body.

1:15 Ratio

3:30 Total

15g Dose

92°C Temp

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Parameters

15 g
Coffee: 225 g
Water: 1:15
Ratio: 92 °C
Temp: 5 medium
Grind: 3:30
Total: ~230 ml
Yield

Grind · 5/10 · medium

FINE COARSE

What is 5/10 on your Comandante C40 or 1Zpresso? Gota turns it into clicks

Method

3:30 · total

Bloom 1 / 6
0:00

45s

Open the switch. Pour 50g in a spiral. Let it bloom.

+50g→ 50g Spiral 5g/s 10s Valve: Open 92°C
Pour 2 / 6
0:45

25s

Close the switch. Pour the final 175g gently to 225g.

+175g→ 225g Fill gently Valve: Closed
Steep 3 / 6
1:10

1m15s

Let it steep.

1m 15s Valve: Closed
Prepare 4 / 6
2:25

5s

Open the switch.

Valve: Open
Wait 5 / 6
2:30

1m

Wait until it stops dripping.

1m Valve: Open
Done 6 / 6
3:30

Drawdown complete.

Notes

Use 50g for the open bloom and close the valve before beginning the main pour. If release stalls after immersion, coarsen 1 click and keep bloom agitation gentle; a fines-heavy bed compacts easily when reopened.

Original source

Recipe by brewnotes.co, published at instagram.com.