Place fresh raspberries and cold water in a blender.
Blend until the raspberries are completely pureed.
Pour the raspberry puree into a large pitcher.
Add lemon juice, raspberry syrup, and granulated sugar to the pitcher. Pour in the remaining cold water.
Slowly stir the ingredients together until homogenous.
Serve immediately and enjoy!
Notes
If you do not have access to fresh raspberries, you can use frozen ones. If this is the case, you will want to let them sit in the fridge until they are soft before pureeing them.I recommend using freshly squeezed lemon juice, but if you do not have fresh lemons, you can use bottled lemon juice instead. You can store this lemonade in the fridge for up to one week.