Eggs are a powerhouse of protein and an essential part of many diets. However, eating a spoiled egg can lead to food poisoning and digestive issues. Whether you've bought eggs recently or found a carton sitting in the refrigerator for weeks, it's important to know how to check their freshness before cooking.
Here are six simple methods to determine whether an egg is still good to eat—most of them without even breaking the shell.
1. Try the Water Float Test
This is one of the most reliable ways to check an egg's freshness.
How to do it:
Fill a bowl or glass with cold water.
Gently place the egg into the water.
Results:
Sinks and lies flat: Very fresh.
Sinks but stands upright: Older but usually still safe to eat.
Floats to the surface: Likely spoiled and should be discarded.
Eggs float because, as they age, air enters through the shell and enlarges the air pocket inside.
2. Shake the Egg Near Your Ear
A quick sound test can provide clues about freshness.
What to do:
Hold the egg close to your ear.
Gently shake it.
What to listen for:
No noticeable sound: Usually fresh.
Sloshing or watery sound: The egg may be old, as the contents have become thinner over time.
3. Use a Flashlight (Candling Method)
This traditional method is commonly used to inspect eggs.
How to do it:
Hold a flashlight behind the egg in a dark room.
Observe the inside of the shell.
What you'll see:
Fresh eggs have a small air pocket.
Older eggs develop a larger air pocket as moisture and carbon dioxide escape.
4. Inspect the Shell Carefully
The eggshell itself can reveal signs of spoilage.
Look for:
Cracks
Sticky spots
Powdery residue
Unusual discoloration
These signs may indicate bacterial contamination or spoilage, and such eggs should be avoided.
5. Check the Yolk and White After Cracking
If you've already cracked the egg, its appearance can tell you a lot.
Fresh egg:
Yolk sits high and round.
Egg white is thick and stays close to the yolk.
Older egg:
Yolk appears flatter.
White spreads out quickly and looks watery.
While an older egg isn't always unsafe, quality declines with age.
6. Trust Your Nose
The smell test is often the clearest indicator of spoilage.
What to do:
Crack the egg into a separate bowl.
Smell it before using.
Warning signs:
Strong sulfur-like odor
Rotten smell
Any unpleasant or unusual odor
Fresh eggs should have little to no smell.
Quick Safety Tips
Store eggs in the refrigerator at a consistent temperature.
Keep them in their original carton to protect them from odors and moisture loss.
When in doubt, throw it out.
Always crack eggs into a separate bowl before adding them to recipes.
The Bottom Line
The water test, candling method, shell inspection, and smell test are all simple ways to check whether an egg is fresh or spoiled. Among them, the float test and smell test are generally the most reliable. Taking a minute to check your eggs can help you avoid foodborne illness and ensure you're using safe, high-quality ingredients in your meals.
