Mill the grains and dough-in targeting a mash of around 1.5 quarts of water to 1 pound of grain (a liquor-to-grist ratio of about 3:1 by weight) and a temperature of 151 °F (66 °C). Hold the mash at 151 °F (66 °C) until enzymatic conversion is complete. Infuse the mash with near-boiling water while stirring or with a recirculating mash, the system raises the temperature to mash out at 168 °F (76 °C). Sparge slowly with 170 °F (77 °C) water, collecting wort until the pre-boil kettle volume is around 5.9 gallons (22.3 L) and a gravity of 1.051 (12.6 °P).
The total wort boil time is 60 minutes. I prefer to mix in the lactose with the first runnings, which gives me lots of time to make sure it gets dissolved before firing up the kettle. Add the first hop addition as soon as the wort reaches a full boil and then start your timer. Add Irish moss or other kettle finings with 15 minutes left in the boil.
Chill the wort to 68 °F (20 °C) and aerate thoroughly. The proper pitch rate is 2 packages of liquid yeast or 1 package of liquid yeast in a 2-liter starter. Ferment at 68 °F (20 °C). When finished, carbonate the beer to approximately 1.5 to 2 volumes.