How can I replicate the flavor of Mountain Dew? Mountain Dew is often described as 'citrus' flavor but that is a broad range of fruits with infinite possible combinations. It does have orange juice in the ingredients, but also &quot;natural flavor&quot;. How can I recreate the flavor of Mountain Dew using ingredients available to me, such as fruit juices, with no added sugar or caffeine?
OK, this is dangerously close to a recipe request, but far enough away that I feel OK to answer.

Use the rule of two.


2 cups of sugar  
2 two oranges  
2 limes  
2 lemons  


Juice and zest the whole fruit.

Strain and and fill to 1 gallon with water. Filter if you want it to be clear.

Carbonate using whatever technique you normally use whether that's a Cornelius keg or soda stream.