1 bottle Root Beer extract
5 gallons of water
5 pounds of sugar
5 pounds dry ice
30 minutes standing time
Use a 10-gallon container. The mixture will EXPAND.
Make a syrup out of 1-gallon warm water and sugar.
Add 4 more gallons of water. Stir.
Add root beer extract. Stir.
Add dry ice and leave uncovered for 30 minutes.
References / Source:
Pow Wow 2001