Sugar the Rim: Pour the water into one shallow bowl and the sanding sugar into another. Dip the rim of a champagne flute into the water, then into the sugar, turning gently so it coats evenly.
1 tablespoon water, 2 tablespoons clear sanding sugar optional
Add the Bubbles: Slowly pour the prosecco into the prepared glass, tilting slightly to keep it lively instead of explosive.
4 ounces prosecco or other dry sparkling wine
Top with Juice: Add the white cranberry juice, adjusting slightly if you like it drier or sweeter.
2 ounces white cranberry juice
Garnish and Serve: Finish with a small sprig of rosemary and a few whole cranberries if using, then serve immediately while it’s cold and bubbly.
1 small fresh rosemary sprig optional, 1 tablespoon whole cranberries optional