Pour the Prosecco, gin, and cranberry juice directly into your glass of choice. If you prefer a lighter, fizzier drink, add the soda water as well. Stir gently with a cocktail spoon to combine all the flavors.

Fill the glass with ice to chill the cocktail. Finish by garnishing your drink with sugared cranberries and a fresh rosemary sprig. I like to use the rosemary because it adds a festive aroma and makes the cocktail look beautiful for the holidays.