Old Fashioned Orange Soda Extract
Yields four gallons; recipe included with extract gives ingredient proportions for any increment.
Second batch three weeks and still no fiz. Contains Sodium Benzoate which some say inhibits yeast metabolism. My gnome Birch Beer and Cream Soda developed a lot of CO2.
The overtone of 'cough syrup' is pretty strong in this one - we dumped it out, and won't be making it again. It's probably okay for toddlers who aren't very picky.