Combine the sugar, boiling water, and rosemary. Stir until the sugar dissolves.
Let rest for at least 15 minutes. Strain out the rosemary.
Notes
Simple Syrup: This recipe can be made in any quantity you like. Just use equal parts water, sugar, and a sprig or two of rosemary.Keto Version: Swap out the sugar in the syrup for a sugar-free sweetener.