In a mixing bowl, combine the instant coffee, sugar, and hot water.
Using a hand mixer or a whisk, whip the mixture vigorously. You can also do this by hand, but it will require more effort and time. Keep whipping until the mixture becomes light and fluffy with stiff peaks. This can take anywhere from 2 to 5 minutes.
If you prefer your Dalgona coffee cold, fill a glass with ice cubes and pour milk over them, leaving some space at the top.
Gently spoon the whipped coffee mixture on top of the milk. You can create a layered effect by not mixing the coffee and milk together.
If you like, you can dust the top of the whipped coffee with cocoa powder or a sprinkle of cinnamon for added flavor and presentation.
Stir the coffee and milk together before drinking if you prefer a more blended taste.
Enjoy your homemade Dalgona coffee!
