To cook corn on the cob by boiling, the general recommended cooking time is between 2 to 10 minutes depending on the method and desired tenderness:

• The most common and straightforward method is to boil shucked corn in salted water for about 3 to 5 minutes until the kernels are tender and golden. This time frame yields sweet, juicy corn without overcooking it

• Some sources suggest boiling for 5 to 7 minutes, especially if the water contains added ingredients like milk, butter, sugar, and salt to enhance flavor

• Another approach is to bring the water to a boil, add the corn, cover the pot, then turn off the heat and let the corn cook in the hot water for about 10 minutes. This method gently cooks the corn and keeps it tender

• For crisp-tender corn, 2 to 4 minutes boiling time is usually sufficient, especially if cooking fewer ears at once or if you prefer firmer kernels

In summary, boiling corn on the cob typically takes about 3 to 5 minutes for fresh corn, with some variations allowing up to 10 minutes if using residual heat after turning off the stove. Over 10 minutes can make the corn tough