Chef’s Note: To make no-fail hard-cooked eggs, place the eggs in a small saucepan and cover with cold water. Bring the water to a boil, remove from the heat, cover and let sit for 10 to 12 minutes. (In the Black Forest, we traditionally add 1 tablespoon of white vinegar along with the water to help seal the eggs in case some crack during cooking.) Drain the eggs and set under cold running water to cool.