Doc,
I used Hallertau for bittering and 40g of Hersbrucker at strikeout. Gave a very nice, pleasant aroma too.
Came out particularly nice. What I found is that if fermented correctly the yeast should leave a little bit of character, sort of a wine-like fruitiness.
What I found with the yeast is that the beer tastes like absolute crap pre-lagering. This may have something to do with the fact that it stays in suspension for a quite a while and is pretty cloudy.
When I first encountered this I could have sworn that the beer was infected. It bordered on being phenolic like a wheat beer.
Four weeks of cold conditioning changes this beer into a very nice, extremely popular drop with any type of beer drinker.
Here's the recipe;
A ProMash Recipe Report
AHA Style and Style Guidelines
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18-A German-Style Ale, Kolsch
Min OG: 1.042 Max OG: 1.048
Min IBU: 20 Max IBU: 32
Min Clr: 6 Max Clr: 10 Color in EBC
Grain/Extract/Sugar
% Amount Name Origin Potential EBC
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94.1 8.00 kg. Hoepfner Pils Germany 1.037 3
5.9 0.50 kg. Wheat Malt Germany 1.039 4
Potential represented as SG per pound per gallon.
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
70.00 g. Hallertauer Pellet 5.50 29.3 45 min.
40.00 g. Hallertau Hersbrucker Pellet 2.90 0.0 0 min.
Yeast
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WYeast 2565 Kolsch
fermented at 18c for 2 weeks, racked into kegs, temp gradually lowered to 0c and lagered for 5 weeks.
Mash Schedule
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Mash Type: Single Step
Grain kg: 8.50
Water Qts: 24.30 - Before Additional Infusions
Water L: 23.00 - Before Additional Infusions
L Water Per kg Grain: 2.71 - Before Additional Infusions
Saccharification Rest Temp : 66 Time: 120
Mash-out Rest Temp : 70 Time: 15
Sparge Temp : 72 Time: 50
Total Mash Volume L: 28.67 - Dough-In Infusion Only
All temperature measurements are degrees Celsius.