Fill a large pot with water. Pour 1 quart of water per ear into your largest pot, add kosher salt, then bring the water to a boil. Once the water is boiling add the corn. Be sure you do not over crowd the pot.
As soon as the water returns to a boil, the corn is done. This should only take 4-5 minutes. Remove from the heat and cover the pot with a lid. The corn can stay in the hot water for up to 30 minutes.