In a blender or food processor, combine the chopped blueberries, Blueberry Balsamic Vinegar, granulated sugar, and water. Blend until smooth and well combined.
Stir in the finely chopped basil into the blueberry mixture. Mix well to incorporate.
If using Greek yogurt, gently fold it into the blueberry mixture until evenly distributed. This adds creaminess to the popsicles, but you can omit it for a dairy-free version.
Taste the mixture and adjust the sweetness if needed by adding more sugar, according to your preference.
Pour the blueberry-basil mixture into popsicle molds, leaving a little space at the top for expansion.
Insert popsicle sticks into the molds and freeze for at least 4-6 hours, or until completely frozen.
Once the popsicles are frozen solid, remove them from the molds by running warm water over the outside of the molds for a few seconds. Gently wiggle the popsicles out and place them on a baking sheet lined with parchment paper.
Serve immediately and enjoy these refreshing Blueberry Basil Balsamic Popsicles!