Mash the blueberries with the sugar and ¼ cup water using a potato masher in a medium saucepan.
Bring the mixture to a rolling boil over high heat.
Cook for 3 minutes. Remove from the heat.
Add a double layer of cheesecloth to a mesh strainer. Pass the blueberry mixture through the lined strainer, pressing with the back of a spoon.
Store the syrup in a glass jar or airtight container in the refrigerator.
Nutrition facts are sometimes provided below and are calculated using an online calculator. With specific brands of ingredients and additions, omissions, or substitutions the nutrition facts may change. We encourage you to use your own nutrition facts calculator to obtain the most accurate nutrition facts for your meal.