Make the rosemary simple syrup by combining equal parts sugar and water, bringing it to a simmer in a small pot until sugar is dissolved and take off of the heat
Throw a few sprigs of fresh rosemary in and place the lid on to steep for 30 minutes
After this - You can store it in an airtight container for a week in the fridge - so can make ahead of time
Pour all ingredients into a cocktail shaker full of ice and shake like it’ll save your life
Pour into your glass, and garnish with a rosemary sprig