1 (3 oz.) bottle root beer extract
4 lbs. sugar
4 gallons water
Combine sugar, root beer extract and 1 gallon warm water in
5 gallon tall cooler. Stir until sugar is dissolved. Add 3
pounds block dry ice; this will cause mixture to bubble;
add 2 gallons water and have lid ready to put on container.
DO NOT put it on tight.
Let bubble for about 1/2 hour and add rest of water. Root
beer will bubble about 2 hours. When bubbling has stopped,
root beer is ready to drink. Put in gallon plastic jugs and
cap. Will keep in refrigerator for some time.