Combine the ingredients in a saucepan and place over high heat. Stir until the sugar has dissolved.

Let the concentrate boil for 5 minutes.

When time is up, remove pot from heat. Let the concentrate steep for an additional 10 minutes.

Strain the concentrate into a jar or bottle. Let it cool until it is at room temperature, then refrigerate.

The concentrate will keep 2-3 weeks in the fridge.