Make sure you have a few friends to help you drink this before making it!
5 lbs sugar
1 bottle root beer extract
2 1/2 gallons water
2 more gallons water
6-7 lbs dry ice
Use a 5 gallon container. Mix first 3 ingredients thoroughly, then add 2 more gallons of water. Add the dry ice and let sit for 1-2 hours for best cabonation and flavor