mix it all together in a large 5 gallon drink cooler that has a screw-top lid. Once sugar is dissolved add a large package of dry ice. screw on lid till fog comes out in a fast steady stream. Continue tightening the lid periodically to maintain pressure...otherwise the soda will be flat. I have on the ingredient list vanilla extract but use rootbeer extract...the program couldn''t find rootbeer extract in it''s database...