Add 2 gallons of water in to 20qt or slight larget brew pot. Raise the temp of the water to 155 degress F. Pour the custshed grains in to the grain bag. Mash grains between 150 and 155 degrees F for 60 minutes.
Boil 1 gallon of 170 degrees water. Once 60 minute mash is done, pour over grain bag.