Wash and peel off the skin of the water chestnuts. Rinse them clean. Then rinse the dried sugar cane and the rest of the ingredients that come in the sugar cane packet (dried carrot, arrowroot, and imperata root)
Step 2 — Add Everything to the Pot
Add the water chestnut, dried sugar cane, and the rest of the ingredients that come in the sugar cane packet (dried carrot, arrowroot, and imperata root) into a large pot along with the water.
Step 3 — Boil and Simmer
Bring the pot to a boil, then lower the heat and let it simmer for about 1 to 1.5 hours.
Step 4 — Sweeten and Serve
Add the rock sugar, or any sugar you prefer, and simmer until it's fully dissolved.
Tip: You can enjoy this drink hot right away, or let it cool and refrigerate it to drink cold — both ways work well.
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Notes
Simmer low and slow. A long, gentle simmer draws out more sweetness from the sugar cane and roots than a quick boil would.
Adjust the sugar to taste. Rock sugar gives a fragrant sweetness compared to white sugar. Nonetheless, you can use any sugar or your choice or you can even skip the sugar.