Toasted Rice Chuhai

Here, it's sweetened with a simple syrup steeped with toasted sweet rice and vanilla,
giving it a cream soda-like flavor—and making it wonderfully addictive, even without the added spike of soju. Make a big batch of the syrup now and stash it in the fridge. Then the next time you're hankering for something bubbly and sweet (or looking for not-so-fruity summer cocktail), you need only to stir a bit together with soju, a splash of rice vinegar for brightness, and a long pour of seltzer water.

Makes about 1 1/2 cups syrup

Toasted Rice Syrup

• 1cup sweet rice (sometimes called glutinous or sticky rice)*
• 1cup evaporated cane juice (or substitute granulated or turbinado sugar)
• 2cups water
• 1teaspoon vanilla extract

Toasted Rice Chuhai

• 1 1/2ounces Jinro Soju
• 1 1/2ounces toasted rice syrup
• 1/4 to 1/2teaspoons rice vinegar (or substitute lemon juice)
• Ice
• Seltzer

https://food52.com/blog/17445-a-toasty-sweet-cocktail-where-rice-is-both-sweetener-and-spirit