Place 1 1/2 cups (about 6 ounces) frozen or fresh cranberries, 1 cup water, and 3/4 cup granulated sugar in a small saucepan over medium heat and bring to a boil. Reduce heat to low and simmer until cranberries are falling apart, about 15 minutes. Strain through a fine mesh strainer into a medium bowl and let the strainer sit over the bowl until the syrup has cooled to room temperature, about 1 hour. Discard the solids and refrigerate the syrup in a container with a tightfitting lid for up to 2 weeks.
Bartender at San Francisco's Heaven's Dog and owner of Small Hand Foods, Jennifer Colliau will blow your mind with this bartender secret: You do not need to boil your simple syrup. In fact, it's preferable not to! Jennifer shows you how to make simple syrup using cold tap water in this video.