How to Make Hard-Boiled Eggs in the Oven
"Hard-boiling" eggs in the oven is perfect for making large batches of eggs, and it offers consistent results with little fuss or attention required.
Preheat the oven to 325 degrees F. Put a whole (unopened) egg in each individual cup of a 12-cup muffin pan. Bake for 30 minutes, then remove and immediately place in an ice water bath. Allow the eggs to cool, and then peel.