First, you put 6 tsp of instant coffee powder, 5 tps of sugar and 300 ml of water in some bowl and mix it with hand blender. You can also put it in shaker. You mix it until it is “cream”.
Then, you split the “cream”. First half you put in glass. Second half you leave in bowl, add 200 ml of milk and mix it. This mixture you add to glass to the first half of “cream”.
Finally, you can add to glass more milk, but this step is on you own.