How to Make a Boozy Watermelon Slushy

After last summer’s frosé frenzy, we’re all craving the next big chill. At Treasury in San Francisco, there’s always something icy churning at the bar. “Slushies signal a good time,” says beverage director Carlos Yturria, the brains behind this watermelon-based party starter, spiked with sherry and Aperol.