In a blender, combine club soda, sugar, drink mix and ice cubes.
Blend for 30 seconds, stir if needed and blend another 30 seconds or until desired consistency is reached. You may need to pulse the blender if it’s too thick.
Notes
Homemade slushies are best enjoyed right out of the blender but if you happen to have a little extra leftover, freeze it in ice cube trays and then blend again to enjoy another time!