DIY Root Beer Recipe
root beer extract
of dry ice
a container that can hold all of the above ingredients plus room for rapid bubbling
Mix the water, sugar and root beer extract together in a large container.
Gently, with a pair of tongs, add in the dry ice.
Note that this recipe will bubble heavily with the addition of the dry ice so your container must be large enough to be able to handle all the ingredients plus the rapid bubbling.