Pour in the hot water into the bowl and using an electric mixer, mix the instant coffee and sugar with water for about 2 to 4 minutes until it's frothy and stiff.
Fill two glasses with ice and milk. Scoop the whipped coffee over milk for each glass. Serve immediately.
Notes
You can use other sweeteners such as coconut sugar, brown sugar or Stevia for this recipe.
If looking for a nondairy milk option, oat milk works well.
Make sure you're using instant coffee and not ground coffee. Ground coffee won't work for this recipe as it can't dissolve in hot water.