Serious Eats: Recipes
DIY Sour Mix
The true beauty of making this mix is having a fresh, versatile, and easy cocktail mixer for parties. There's no reason to buy sour mix when in 10 minutes you could hand-make something that's infinitely more delicious.
If you'd like to use oranges, grapefruits, or agave nectar, keep in mind that they are sweeter than the ingredients in this recipe so you'll have to adjust the quantities to taste. Refrigerate the mixture, and it should last a week or two. (You can tell it's turning if it starts to get cloudy particles.) Adding a little vodka will make it keep a month, but it won't taste as fresh after a long storage.