Pour water into large pot until halfway full. Add salt and sugar (if using).
Bring water to a boil.
Add milk and unsalted butter. Slowly add corn. Add more water if necessary to cover corn. Reduce heat to medium.
Boil for 3 minutes (or longer if preferred). Please note corn kernels will become "very tough" if boiled longer than 10 minutes.
Drain before serving.
After removing husks and silks from each ear of corn, cut in half if preferred.Thoroughly wash in warm water and 1/2 cup of salt. Rinse thoroughly in clear/warm water. Yellow corn is already sweet. However, if you prefer more sweetness, add 1/2 teaspoon of granulated sugar to the water mixture before boiling corn.