Instructions:
- Gently place the eggs in a single layer at the bottom of a medium saucepan.
- Fill the saucepan with cold water, ensuring the water covers the eggs by at least 1 inch (2.5 cm).
- Place the saucepan on high heat and bring the water to a rolling boil.
- As soon as the water reaches a full rolling boil, immediately remove the pan from the heat. Cover the pan tightly with the lid. Let the eggs stand in the hot water for 10-12 minutes for a fully firm, classic hard-boiled yolk. (Adjust time for desired doneness: 6-7 minutes for jammy, 8-9 minutes for creamy).
- Immediately transfer the cooked eggs to a large bowl filled with ice water (an ice bath) to stop the cooking process. Let them cool completely for at least 5-10 minutes before peeling. This rapid temperature change helps prevent the green-gray ring and ensures easy peeling.