Such a sexy title for a blog post, I know.
Back in the day, when I wrote about my clone recipe for Baskin Robbins' Daiquiri Ice, I said citric acid might be hard to find outside of health food stores, so I gave a couple other options.
A lovely reader (I have readers?!) just let me know that she spotted citric acid near the canning supplies at her local Uber Mart. So, if you are looking to get your citric acid, now's the time.
Citric acid is the best ingredient to use if you can get it, because it adds tartness without adding sweetness or any other flavors. But, any of the other subsitutes like Fruit Fresh or even unsweetened Kool-Aid powder, will work fine. The main thing is to add a little at a time, and taste as you go.
Each time you make the recipe, your limes will be a little different, so each time you'll need to add a different amount of sour.