Pernicious Recipe

1. Heat strike water and dough‑in

Heat 5.5–6.0 gallons of strike water to approximately 166°F (to hit a target mash temperature of 152°F). Dough in the crushed grains (Pale 2‑row, Munich, crystal, wheat, flaked oats, acidulated) into the mash tun, stirring to avoid dough balls and ensure full hydration.

2. Mash rest

Hold the mash at 152°F for 60 minutes. Stir gently at 15 and 30 minutes to ensure even temperature and enzymatic activity. Check mash pH near the end; target pH 5.2–5.4. If pH is high, a small infusion of acidulated malt or food‑grade lactic acid can be used to adjust.

3. Mash out

Raise the mash to 168–170°F (mash out) for 10 minutes to stop enzymatic activity and improve wort runnability.

4. Sparge

Vorlauf until runnings are clear, then lautering/sparge with enough water to collect ~6.5–7.0 gallons of wort in the kettle (account for boil-off). Aim to collect pre‑boil gravity appropriate for ~1.070 OG (adjust as needed to hit target ABV ~7.3%).

5. Boil

Bring the kettle to a vigorous rolling boil for 60 minutes. Add Irish moss or Whirlfloc with 15 minutes left in the boil to aid cold break/clarity.

6. Bittering hop addition

Add 1.0 oz Citra at 60 minutes for a modest bitter backbone. Because this is an IPA focusing on hop flavor and aroma, keep early bittering additions minimal.

7. End of boil

At the end of the 60 minute boil, shut off heat and chill wort rapidly to 95–100°F for kettle souring (if performing a souring step) or down to ~68°F for immediate yeast fermentation if skipping kettle sour.

8. Prepare for kettle sour (if using kettle sour method)

If you plan a kettle sour for a bright, controlled acidity: after the boil, cool the wort to 95–100°F. Optionally add a Campden tablet (crushed and mixed) and wait 24 hours to reduce chlorine if your water or ingredients might carry wild organisms; then re‑pitch Lactobacillus plantarum. Sanitize anything that will contact the wort.

9. Pitch Lactobacillus

Pitch the Lactobacillus plantarum (1 tbs or according to manufacturer instructions) into the cooled wort and maintain a temperature between 95–110°F for 18–48 hours. Cover the kettle with sanitized foil to minimize contamination. Stir gently once or twice per day. Monitor pH: target final kettle pH between 3.4 and 3.6 for a balanced sourness. Note: if you prefer a milder tartness, stop earlier (pH ~3.7–3.8).

10. Boil post‑souring

Once desired acidity is reached, bring the kettle back to a boil for 10 minutes to kill Lactobacillus and sanitize the wort. This also drives off any unwanted volatile compounds produced during souring. After this short boil, chill wort to fermentation temperature (~66–68°F).

11. Alternative: Mixed culture or co‑fermentation

If you prefer more complex funk, omit kettle sour and instead optionally pitch a Brettanomyces or mixed culture alongside or after primary ale yeast. This will develop more complex, barnyard/funky notes over weeks to months in secondary. If using mixed culture, skip the post‑sour boil but be prepared for longer aging and sanitation considerations.

12. Oxygenation and yeast pitch

Aerate the cooled wort well (oxygenate to ~8–10 ppm dissolved oxygen for 5 gallons) and pitch the American ale yeast (one package, rehydrated or a properly prepared starter). Target fermentation temperature 66–68°F for a clean IPA profile. If using co‑pitch with Brett, pitch Saccharomyces first and Brett later or co‑pitch depending on desired character.

13. Primary fermentation

Allow primary fermentation to proceed for 5–7 days or until vigorous activity subsides and SG has dropped significantly. Target attenuation should be consistent with an FG in the ~1.010–1.014 range depending on final acidity; aim for ~7.3% ABV starting from ~1.070 OG.

14. Dry hopping schedule

After primary fermentation has slowed (typically day 4–7), perform a dry hop: add Mosaic 1.0 oz, Amarillo 1.0 oz, Simcoe 0.5 oz in a sanitized hop sack or directly. Leave hops on for 3–5 days at fermentation temperature to capture bright hop aroma while minimizing grassy character. Optionally add remaining Mosaic 0.5 oz at packaging/crash to preserve very fresh notes.

15. Cold crash and conditioning

After dry hopping, cold crash to ~36–40°F for 24–48 hours to help drop out hop matter and yeast. Rack to a secondary or directly to bottling/kegging vessel depending on process. If using Brett or mixed culture for additional funk, transfer to a secondary and age at cellar temps (60–68°F) for weeks to months as desired.

16. Packaging

Sanitize keg or bottles thoroughly. If bottling, dissolve 4 oz corn sugar in 8 oz boiling water, cool and mix gently into beer for priming to reach ~2.4 volumes CO2 (adjust for temperature and desired carbonation). If kegging, force carbonate to ~2.4–2.6 volumes CO2.

17. Conditioning

Condition bottles at 65–70°F for 10–14 days to carbonate, then lager/cold condition for 2–7 days to let flavors meld. For kegged beer, carbonate and rest 24–72 hours before serving. For mixed culture versions, allow extended aging for Brett character development.

18. Serve

Serve cold (45–50°F) in a tulip or IPA glass to highlight hop aroma and acidity. The finished beer should present a bright, clean hop profile with a controlled tartness and a slightly soft mouthfeel from wheat and oats, finishing crisp and bitter‑balanced at ~7.3% ABV.

19. Sanitize all equipment that contacts wort post‑boil. When working with Lactobacillus or mixed cultures, maintain strict sanitation protocols and plan separate equipment or thorough sanitation to avoid cross‑contamination of other beers. Adjust hops and souring intensity to taste—this recipe is designed as a rotating sour IPA base, so swap hop varieties each batch for a rotating series of flavor profiles.