Closed Bloom

Hario Switch 02 Hario switch by brewnotes.co

This Hario Switch recipe reverses the related open-bloom idea: the bloom steeps behind a closed valve before open percolation completes the brew. The goal is a sweet, balanced cup with clean separation.

1:15.2 Ratio

2:15 Total

12.5g Dose

92°C Temp

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Parameters

12.5 g
Coffee: 190 g
Water: 1:15.2
Ratio: 92 °C
Temp: 5 medium
Grind: 2:15
Total: ~190 ml
Yield

Grind · 5/10 · medium

FINE COARSE

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

Method

2:15 · total

Bloom 1 / 4
0:00

45s

Close the switch. Pour 50g in a spiral. Let it steep.

+50g→ 50g Spiral 5g/s 10s Valve: Closed 92°C
Pour 2 / 4
0:45

30s

Open the switch. Pour in a spiral to 120g.

+70g→ 120g Spiral 4.7g/s 15s Valve: Open
Pour 3 / 4
1:15

1m

Finish over the centre of the bed to 190g.

+70g→ 190g Center pour 4.7g/s 15s Valve: Open
Done 4 / 4
2:15

Drawdown complete.

Notes

Saturate the grounds with 50g while the valve is closed and hold for 45s before release. Keep the finishing pours controlled and use a medium grind; if flow stalls after opening, coarsen 1 click.

Original source

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

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In the cup