How to make simple syrup: In a small saucepan over medium-high heat, combine 1 cup (240ml) water, 1 cup (200g) granulated sugar, and 1 tbsp light corn syrup. Bring to a simmer and allow to simmer until the sugar is completely dissolved, about 10 minutes. Turn off the heat and let cool to room temperature. Use immediately, or store in an airtight container in the refrigerator for up to 1 month.