Mill the grains and mash in 3 gallons (11.3 L) of water at 150 °F (65 °C) for 60 minutes. Vorlauf until the runnings are clear and sparge the grains with enough 168 °F (75 °C) water to obtain a 6-gallon (23-L) pre-boil volume. Boil the wort for 60 minutes, adding hops at the times indicated. After the boil, turn off the heat and chill the wort to 68 °F (20 °C), transfer the wort to the fermenter, aerate well, and pitch the yeast. Ferment at 68 °F (20 °C). On day three of primary fermentation add the apricot purée. Ferment for an additional seven days and rack to a secondary fermenter for additional clearing if desired. When fermentation and clearing is complete, transfer the beer to a bottling bucket or keg and add apricot extract 0.5 oz. (14 mL) at a time, gently stirring and tasting in between additions until the desired intensity of fruit flavor and aroma is obtained. Carbonate and package the beer as desired.