Use a large insulated drink cooler to brew it in, and everyone can help themselves using the spigot, or I will put it in my very largest plastic tub inside of my witch cauldron so the dry ice can create the steamy effect!
Dry ice can be dangerous. Be sure to use gloves when handling.
6 cups white sugar
3 1/3 gallons cold water
1 (2 ounce) bottle root beer extract (read instructions, sometimes this differs with the brand you buy and you don’t use the whole bottle, but most brands you do)
4 pounds dry ice
1. In a large cooler, mix together the sugar and water, stirring to dissolve sugar completely. Stir in the root beer extract. Carefully place the dry ice into the cooler, and cover loosely with the lid. Do not secure the lid, as pressure may build up.
2. Let the mixture brew for about an hour before serving. Leftover root beer can be stored in one gallon milk jugs.