I debated whether to title this a “Grapefruit Drinking Vinegar Soda” or a “Grapefruit Shrub Soda” (Try saying THAT five times in a row. I can barely say it once.). Whatever you want to call it, it’s basically a healthy, vinegar-based soda and my sugar-free answer to PokPok’s Som Soda. If you’re unfamiliar with PokPok, it’s a local, Thai-inspired restaurant here in Portland that’s garnered tons of national acclaim. The owner, Andy Ricker, also authored a cookbook and began selling his line of drinking vinegars to retail locations. While I absolutely love their soda, I needed a healthier, sugar-free option and tinkered in my kitchen until I came up with this easy recipe. Traditionally, shrubs are made by steeping and fermenting crushed fruit in vinegar for an extended period of time–anywhere from 24 hours to four weeks–so this isn’t exactly a real shrub. But it yields a shrub-like flavor in minutes simply by mixing fruit juice and vinegar. It’s an easy mocktail that gives you that lovely, fermented tang without the alcohol. Although I imagine you could try adding some tequila in there if you’re feeling festive! Hmmm…….