zest of 2 lemons
zest of 2 limes
2 tsp Citric Acid
Boil in 2 Cups water for 10 minutes, and strain.
Put back on stove and dissolve 1 1/2 Cups of white sugar for every 1 Cup of tea.
After cooling, mix syrup with soda water in 1:4 ratio (3 Tablespoons per glass), or more or less to taste.
I decided to start with a basic tea of lemon and lime zests and citric acid, then add juice until it tasted right. It turns out that the right amount of juice is none.
Since the recipe didn't call for any bark, roots, nuts, or seeds, I figured it didn't need to boil for the full 20 minutes to extract the flavors. I decided to cut the boil time to 10 minutes (It was probably closer to 8 minutes when I pulled it off the burner).
It was very easy to strain; it went right through the coffee filter.
I used white sugar instead of agave syrup to keep the final syrup as light-colored as possible.
by itself, the syrup tastes remarkably like Froot Loops. Mixed with soda it makes a very convincing substitute for Sprite or 7-Up. I made a cocktail by mixing it with whiskey (a 7-and-7), and I would not have been able to tell it wasn't a commercial soda.