How long does it take to hard-boil an egg?
Once the full boil is attained, REMOVE from the heat, cover with a tight fitting lid, and let stand for 24 minutes only. Answer Depends on how hard you like them, but 3 to 10 minutes is a “normal” range when the water is at a rolling boil. You can purchase an egg timer that goes into the cold water with the eggs and turns purple when the eggs would be ready.