To boil corn on the cob, the typical recommended cooking time varies depending on the method and preference, but generally falls within these ranges:

• 3 to 5 minutes : This is the most common quick boiling time after the water returns to a boil once the corn is added. It yields tender, crisp-tender kernels and is suitable for fresh sweet corn

• 2 to 4 minutes : Some sources suggest this shorter time is enough to get crisp-tender corn that retains sweetness, especially if you rotate the cobs in the boiling water to cook evenly

• About 10 minutes : Another popular method is to bring water to a boil, add the corn, cover the pot, then turn off the heat and let the corn sit in the hot water for 10 minutes. This method keeps the corn tender and sweet without overcooking

• Up to 30 minutes : Leaving the corn in hot water (after turning off the heat) for up to 30 minutes can keep it warm and perfectly cooked while you prepare other dishes

Additional tips:

• The corn is done when the kernels turn bright yellow and look plump and tender

• Some people gauge doneness by the smell of corn filling the kitchen or by the color change of the kernels

• Avoid overcooking to maintain sweetness and texture.
• Salt can be added to the boiling water for flavor, but sugar or lemon juice are optional additions to enhance sweetness

In summary, for fresh sweet corn, boiling for about 3 to 5 minutes after the water returns to a boil is sufficient for tender, flavorful corn. Alternatively, you can boil briefly and then let the corn sit covered off the heat for about 10 minutes for a foolproof result