Set the stovetop to a low medium heat level. Pour milk into the pot and add the cinnamon stick.
Add Instant Nescafe to taste, I added 1 spoon because I don't drink too much coffee. Along with the Nescafe add brown sugar or the sweetener you prefer. Stir with a whisk occasionally.
In a different bowl, add 2 tsp of corn starch and pour a splash of cold milk. Stir with a fork until it has no clumps.
Slowly pour the cornstarch and mixture into the pot while stirring until it becomes thickened.
You can take the cinnamon stick out if you'd like, I keep mine in. Pour into your mug and enjoy.