Blackberry Sour

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One of the most critical factors is pitching rate, Philly Sour is really sensitive to pitch rate which is why people have problems with reusing it. Just going from 1bn cells/litre to 2bn cells/litre can increase the final pH by 0.2-0.3.

See the suigeneris blogs I linked to over in the main HBT thread :
https://www.homebrewtalk.com/thread...xperience-to-share.682096/page-7#post-9085562
Thanks, lots of detail there.
I used 1 pack Philly Sour in a 22l batch, not sure what that is in cells/litre.
OG 1.047, ferment 25C. After 9 days PH 3.2
 
First (proper) tasting of Blackcurrant Sour, based on ClownPrince's recipe.

Lovely colour, a very refreshing summer beer.

OG: 1.047 (before blackcurrant & lactose additions), FG: 1.007, target 1.009
ABV 6.3%
PH 3.2 @ day 9

21 litre batch
Yeast: 1 pack Philly Sour.
Ferment: 25°C for 9 days

Malts (4 kg)
2 kg (40.8%) — BESTMALZ BEST Pilsen — Grain — 3.5 EBC
2 kg (40.8%) — Weyermann Wheat Malt, Pale — Grain — 3.9 EBC

Other
500 g (10.2%) — Sugar, Table (Sucrose) — Sugar — 2 EBC — Primary
Blackcurrants, boiled, crushed & cooled: 1kg at start of ferment; 500g at day 7.
500 g (8.2%) — Milk Sugar (Lactose) — Sugar — 0 EBC — End of ferment

Hops (10 g)
10 g (11 IBU) — Northdown 8.5% — Boil — 60 min


Recipe called for 400g lactose. This upped to 500g. But still a little tart, and I wouldn't want more than one pint!
This could just be from using blackcurrants, which are fairly tart, to start with.

Next year, I'll try aiming for a bit more body, to balance the acidity. With more dextrins, from either a higher mash temperature, or adding some Cara malt.
Alternative might be to reduce the acidity (up the PH), by reducing the initial % of blackcurrants (with higher % later), or reducing the amount of Sucrose.
 

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