Prepare 160 ml (2/3 cup) strong coffee.
While the coffee is still warm, add 5 g (1 tsp) sugar and stir until sugar is dissolved.
Add 80 ml (1/3 cup) milk and stir.
Place 10 ice cubes (1/2 cup) in blender and add sweetened coffee.
Turn the blender on and off quickly a few times to break up the ice.
Add 30 g (2 tbsp) vanilla ice cream. Turn blender on to medium and blend.
After the coffee and ice have blended, add another 10 ice cubes (1/2 cup).
Blend until smooth. If you want a thicker frappe, add a little more ice.
Pour into large glass and serve immediately.