- In a shaker or blender, add the instant coffee and sugar. 
- Pour in a small amount of cold water, just enough to cover the coffee and sugar. 
- Shake or blend vigorously for about 10-15 seconds until the mixture becomes frothy and creamy. The shaking process is essential for creating the signature foam (kaimaki) of the frappé. 
- Fill a tall glass with ice cubes. 
- Pour the frothy coffee mixture over the ice cubes, including the foam. 
- Add cold water to the glass, leaving some space for milk if desired. 
- Stir gently to mix the coffee, water, and foam together. 
- If desired, add a splash of milk to taste. This step is optional and can be adjusted based on personal preference. 
- Serve immediately and enjoy your refreshing Greek frappé!