When talking eggs, the freshest are always best, except for hard-boiled; older eggs are easier to peel. Aim for 1 to 2 week old eggs. To tell how old an egg is, watch how it behaves in its shell in a pan of cold water:
•Stays on its side on the bottom: 3 to 6 days old
•Stays on bottom with wider end tilted up slightly: a bit more than 1 week old.
•Stands on its narrow end: 2 to 3 weeks old.
•Floats at the top: toss it out.