The best time to boil corn on the cob is about 5 minutes once the water has returned to a simmer after adding the corn. This method yields corn that is tender, juicy, and perfectly cooked without becoming too soft. Here is a summary of the recommended method:

• Bring a large pot of water to a boil without the corn.
• Add corn cobs to the boiling water, bring it back to a boil.
• Reduce heat to a simmer and cook uncovered for 5 minutes, stirring or rotating occasionally to ensure even cooking.
• Remove immediately after 5 minutes to prevent overcooking.
• Serve with butter and salt or other preferred toppings.

Some variations mention boiling from 3 to 5 minutes or even 2 to 4 minutes for smaller portions, but 5 minutes is widely considered the optimal time for standard-sized cobs. Boiling longer (e.g., 10 or more minutes) can make the kernels too soft.