To make this citrus simple syrup, begin by juicing lemons and limes. I use a hand juicer.
Freshly squeezed juice is worth the effort and makes the most delicious sour mix.
Pour the sugar and water into a sauce pan and stir until the sugar has dissolved.
Pour the citrus juice in last.
Remove from heat and let it cool completely before decanting.
Use a fine mesh strainer to decant it into a bottle. I used this bottle from Amazon. Add a label if you like—this is especially helpful for guests and parties.
Notes
Homemade Sour Mix can be refrigerated for a minimum of two weeks. I normally keep mine for a month or so.
Feel free to swap some of the citrus for what you have on hand such as oranges or grapefruits. If you use sweet citrus like oranges, reduce the sugar a bit.