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Make sure to mix the powdered milk and water thoroughly until it’s well-diluted. After achieving that consistency, add sugar to taste. Notably, this sugar will not count towards the ice cream itself, as no additional sugar is needed for that portion.
Once the mixture is ready, pour it into a pot and place it on the stove. This is the critical step where you thicken your mixture. Keep stirring continuously to prevent burning; even a minute away from the mixture can lead to undesired results.
As the mixture begins to thicken, you’ll notice foaming. It’s important to remain vigilant—remove the pot from heat if it starts bubbling too much. After constant stirring and careful attention, your mixture will achieve the desired thickness, resembling traditional condensed milk.