Step 1

Combine brown sugar and water in a pot and boil, stirring continuously

Step 2

Once water boils, add rosemary and let simmer for 3 minutes

Step 3

Remove from heat and remove rosemary sprigs (if you want a stronger rosemary flavor, leave the sprigs in longer)

Step 4

Stir in vanilla and salt

Step 5

Let cool and transfer to a bottle or other container (you may have to strain the syrup before transferring)