Gladfield “Black Betty” American Stout

Batch Size

30L Kettle Full; ~20L (in fermenter)

Ingredients

Malts

  • 4.90kg Gladfield Ale Malt (69.7%)
  • 0.75kg Gladfield Munich Malt (10.7%)
  • 0.37kg Gladfield Dark Crystal Malt (5.3%)
  • 0.37kg Gladfield Flaked Barley (5.3%)
  • 0.22kg Gladfield Light Chocolate (3.1%)
  • 0.22kg Gladfield Roast Barley (3.1%)
  • 0.22kg Gladfield Eclipse Wheat (3.1%)

Hops

  • 60min – 15g Pacific Jade 12.7% (19 IBU)
  • 10min – 25g Amarillo 9.5% (9.5IBU)
  • 0min – 25g Amarillo 9.5% (4.4 IBU)
  • 25g Centennial 9.8% (4.5 IBU)
  • Dry Hop (@ SG= 1.016-1.020)
  • 75g Amarillo
  • 75g Centennial

DH rate = ~6g/L


Yeast

Lallemand BRY-97 West Coast Ale Yeast (1 Packet)


Mash Additions:

5.00g Calcium Chloride

1.00g Magnesium Sulfate

4.00g Calcium Sulfate

3.00g Sodium Bicarbonate

3-4mL 80% Lactic Acid (for pH Adjustment - requires pH Meter)

Water Profile

Brewing Process

  1. Heat Strike Water to achieve Mash Temp of 65°C (~6°C above strike).
  2. Add minerals to Strike or Foundation water.
  3. Begin mashing in. Measure the mash pH (once all the grain is added) to achieve 5.2-5.5 (adjust with 1 mL additions of 88% lactic acid, if required).
  4. Mash at 65°C for 60 mins. Confirm no residual starches remain.
  5. Batch sparge with 78°C water until kettle volume is achieved (or stop runoff when the last runnings drop below 1.010 and pH rises above 5.75).
  6. Boil for 60 minutes adding hops and kettle finings at indicated times.
  7. At End Of Boil, whirlpool while chilling (immersion style) or for 10 mins, stand 15 mins or until chilled to pitching temperature.
  8. Transfer to fermenter at 18-20°C, oxygenating wort (inline or via aeration in fermenter).
  9. Rehydrate and pitch yeast as per manufacturer's recommendations. Ferment at 18°C for the first 3-4 days.
  10. Aim to add the dry hop addition on day 5 or ~4-8 Specific Gravity points (1.5-2.0Po) from the predicted Final Gravity.
  11. Once added, cap the fermentation (spunding valves are great for this), raise the fermentation set point to 22°C for at least 48hrs to diacetyl rest.

If fining/ Filtering?

  1. 48-72hrs after FG is reached (i.e. Taste No Diacetyl), Crash to 5-6°C.
  2. Add preferred finings (Klarsol, Gelatine, etc.).
  3. Crash cool to 0-1°C wait for the beer to clear naturally or filter as required.
  4. Keg or bottle condition - your choice? Aim for 2.55-2.65 volumes of CO2.


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