Mash in to achieve temperature of 158 °F (70 °C). This temperature allows alpha amylase to be active but inhibits beta amylase so the resulting beer is slightly sweeter. Hold 30 minutes for conversion. Raise to 168 °F (76 °C) for mashout. Hold 10 minutes. Sparge with enough water to collect 6 gallons (23 L).
Add lactose powder and first hop addition at start of boil. Boil 60 minutes total, adding the Delta hops with 15 minutes remaining.
Chill to 64 °F (18 °C), aerate, and then pitch yeast. Ferment at 64 °F (18 °C) through primary, then let rise to 66°F (19 °C). Add the maple syrup when primary is slowed but still has minor activity. It will ferment the sugar but retain some aromatics. Condition for two weeks then rack to bottles or keg at 2.3 volumes.