1 ¼ cup water
¾ cup sugar
Put the sprigs of hyssop in small pan with the water, cover and bring to a boil. Reduce heat and simmer gently for 10 minutes. Strain into a glass measuring cup, pressing the stems with a wooden spoon to extract all the flavor and liquid. You should have about 1 cup of liquid. Add more water if needed. Return mixture to the pan, add sugar and heat gently, stirring, until sugar is dissolved. Boil hard for 5 minutes. Skim and pour into a glass container to store in the refrigerator.