After what's seemed like five straight months of unrelenting chill and fog, a few Summer days have finally descended on the city, and it's hot. I'm talking feel-the-sidewalks-baking, pool-dipping hot — a rare sight in June in San Francisco.

It's climes like these that call for a refreshing spritzer of a cocktail. It's hard to beat a classic gin and tonic, but this variation — which includes elderflower liqueur, mint, cucumber, and celery bitters — is far better. Don't skimp on the celery bitters; they add grassy notes that add another level of complexity.

For the recipe, keep reading.