This signature strain, from Charlie Papazian , has the ability to ferment at both ale and lager temperatures allowing the brewer to produce diverse beer styles. The recipes in both Papazian's books, The Complete Joy of Homebrewing and The Homebrewers Companion, were originally developed and brewed with this yeast. The name of this strain was changed from Cry Havoc Lager to Fist Bump Yeast in 2019.
When fermented at ale temperatures, the yeast produces fruity esters reminiscent of berries and apples. Hop character comes through well with hop accented beers. Diacetyl production will be very low when proper fermentation techniques are used.
When fermented at lager temperatures, esters are low in high gravity beers and negligible in other beers. Pleasant baked bread-like yeast aroma is often perceived in malt accented lagers. Slightly extended fermentation times may be experienced compared to other lagers. Some fermentation circumstances may produce sulfur aroma compounds, but these will usually dissipate with time. Good yeast for bottle conditioning.
Optimum Fermentation Temperature: 68-74°F
Optimum Cellaring Temperature: 50-55°F
+ Alt beers can be cellared at lagering temperatures
Optimum Fermentation Temperature: 55-58°F
Optimum Lagering Temperature: 32-37°F
Yeast Starter Required
These are live cultures. Although the White Labs tube says you can pitch this directly into your wort without a starter, this is not a good ideal for yeast that has shipped through the mail (unless you pay for ice packs and two day air or Priority Mail shipping). We sell these live cultures with the understanding that it is your responsibility to proof the culture on arrival by making a yeast starter. If you do not have yeast starter equipment, see this link for details on ours. Thank you and enjoy!