We were at a bar in Boston and were brought a cocktail with grapefruit and rosemary simple syrup. We were in love and pledged that we would bring this flavor combination to others. We use a healthy amount of rosemary so that lovely flavor comes through and helps to perfectly complement the grapefruit.
It combines tart grapefruit juice with the lovely taste of rosemary and a bit of honey. It's sweet yet also herbal in a delicious and refreshing way. It's perfect with vodka, gin, rum, mezcal, tequila, and more.