Make the blueberry syrup. Add the blueberries, sugar, and water together.
Bring to a boil and mash the blueberries.
Cook until the mixture thickens to a syrup.
Strain the blueberry bits out. Allow to cool.
Make the lemonade. Juice the lemons.
Stir together the lemon juice and water.
Drizzle in the blueberry juice to sweeten to your liking.
Chill and enjoy cold!
Notes
When adding water to the lemons, remember that any ice you add will further dilute the lemonade, so add less than you think you may need. You may have leftover blueberry syrup. Perfect for pancakes, ice cream, and more!