It’s a common question, especially for those new to collecting fresh eggs from their backyard flock. Sometimes, you just want to be sure an egg is good before you crack it into your favorite recipe. Knowing how to spot a bad egg saves you from a yucky surprise.
This guide will show you simple, easy ways to check. We’ll walk through it step-by-step so you feel confident every time. Ready to learn what makes an egg unsafe?
How Can You Tell If A Chicken Egg Is Bad
Fresh eggs are a wonderful thing. They taste great in cooking and baking. But sometimes, an egg might not be as fresh as it seems.
It’s important to know how to check if an egg has gone bad. Eating a bad egg can make you sick. Luckily, there are a few easy tests you can do at home.
These tests don’t require any special tools. They work for both store-bought eggs and eggs from your own chickens.
The Float Test
One of the most popular and easiest ways to tell if an egg is bad is the float test. This method works because as an egg ages, its shell becomes more porous. Air can get in, and moisture can get out.
An air cell inside the egg gets larger over time. This air cell makes the egg more buoyant.
Here’s how to do the float test:
- Get a bowl or a deep glass.
- Fill it with cold water.
- Gently place the egg into the water.
Observe what the egg does:
- If the egg sinks to the bottom and lies on its side: It’s very fresh.
- If the egg sinks but stands up on one end: It’s still good to eat, but it’s a bit older. The air cell has grown.
- If the egg floats to the surface: It’s likely bad. The air cell is very large, and the egg has probably spoiled.
This test is super simple and effective. It gives you a good idea about the egg’s age and freshness.
The Smell Test
The smell test is another straightforward way to check an egg. Fresh eggs don’t have a strong odor. However, if an egg has gone bad, it will develop a very distinct and unpleasant smell.
This smell can sometimes be detected even through the shell. If you crack an egg and it smells bad, it’s definitely not good to eat.
How to do the smell test:
- Crack the egg into a clean bowl or a separate plate. Don’t crack it directly into your cooking pan.
- Take a sniff.
What to look for:
- No strong smell or a faint sulfuric smell: This is normal.
- A strong, rotten, sulfuric, or foul odor: This is a clear sign the egg is bad.
This test is best done after you’ve already cracked the egg. If the smell is off, discard the egg immediately. Don’t risk tasting it.
The Visual Inspection (When Cracked)
Once you crack an egg, you can learn a lot by looking at it. The appearance of the yolk and the white can tell you if it’s still good.
What to look for:
- Yolk: A fresh egg yolk should be plump, round, and stand up high. If the yolk looks flat, spread out, or seems to be breaking easily, the egg is older, but usually still safe if it passed the smell and float tests. However, if the yolk looks discolored or has any strange spots, it might be bad.
- White (Albumen): The white of a fresh egg will be thick and firm. It will stay mostly around the yolk. As an egg ages, the white becomes thinner and more watery. It will spread out widely in the pan or bowl. A very thin, watery white is a sign of an older egg. If the white has any pinkish or greenish tint, or looks cloudy and unusual, the egg may be contaminated and should be discarded.
Sometimes, you might see small blood spots or meat spots in an egg. These are usually from the hen and are harmless. You can simply remove them with a spoon and cook the egg.
They don’t mean the egg is bad.
Shaking The Egg
This method relies on sound. As an egg ages, the air cell grows larger. This larger air cell can cause the contents inside to move around more freely.
You might hear a sloshing sound if you shake a very old egg.
How to do the shake test:
- Hold the egg up to your ear.
- Gently shake it.
What the sound means:
- No sound or a solid sound: This usually indicates a fresh egg.
- A sloshing sound: This suggests the air cell is large, and the egg is older. It might still be good, but the float and smell tests are more reliable for confirming its safety.
While this can be an indicator, it’s not as definitive as the other methods. It’s best used as a quick check in combination with other tests.
Checking The Shell
The shell of an egg is the first line of defense against bacteria. If the shell is cracked or slimy, it’s a potential entry point for germs. You should not eat an egg with a compromised shell.
Look for:
- Cracks: Even tiny hairline cracks can allow bacteria to get inside.
- Powdery or slimy texture: This can be a sign of spoilage or contamination.
If you find any damage to the shell, it’s best to discard the egg. This is especially true if the egg is going to be stored for any length of time.
Storing Eggs Properly
Knowing how to tell if an egg is bad also means understanding how to keep them fresh for longer. Proper storage can extend the life of your eggs and help maintain their quality.
Key storage tips:
- Refrigeration is key: Always store eggs in the refrigerator. The cold temperature slows down the aging process and reduces the risk of bacterial growth.
- Use the original carton: The carton protects the eggs and helps prevent them from absorbing odors from other foods. It also keeps the pointed end down, which helps keep the yolk centered.
- Store in the main part of the fridge: Avoid storing eggs in the refrigerator door, where the temperature fluctuates more due to frequent opening and closing.
When stored correctly in the refrigerator, eggs can remain good for several weeks, often even a month or more past their sell-by date. The float test is a great way to check an egg even after it’s been stored for a while.
Why Eggs Go Bad
Eggs are a natural product. They have a limited shelf life. Several factors contribute to an egg going bad:
- Age: Over time, the quality of the egg naturally declines. The membrane that surrounds the yolk weakens, and the white becomes thinner.
- Bacteria: If bacteria like Salmonella get into the egg, they can multiply and cause spoilage. This can happen if the shell is cracked or if the hen was infected.
- Temperature: Eggs stored at room temperature for too long will spoil much faster than refrigerated eggs.
The protective cuticle on the outside of a fresh egg helps to prevent bacteria from entering the shell. However, washing this cuticle off (which is often done with commercial eggs) makes refrigeration even more important.
Frequently Asked Questions
Question: How long do fresh chicken eggs last?
Answer: Fresh, unwashed eggs stored in the refrigerator can last for about 4-5 weeks. If they are washed, they should be used within a week or two. The float test is a good way to check their freshness.
Question: Can I eat a floating egg if it smells okay?
Answer: While a floating egg indicates it is old and has a large air cell, it might still be safe to eat if it passes the smell test and has no other signs of spoilage. However, it is best to use it quickly or consider discarding it to be safe.
Question: What are those little red or brown spots in an egg?
Answer: These are called blood spots or meat spots. They happen when a tiny bit of tissue from the hen’s reproductive tract gets into the egg. They are harmless and can be scooped out with a spoon before cooking.
Question: Should I wash my fresh eggs from my chickens?
Answer: It’s generally recommended not to wash farm-fresh eggs until you are ready to use them. Washing removes the natural protective bloom (cuticle) on the shell, which helps prevent bacteria from entering the egg. If the eggs are visibly dirty, you can gently brush off dry dirt or wash them right before cooking.
Question: What if the egg white looks a little green?
Answer: If the egg white has a distinct green or pinkish color, it is a sign of bacterial spoilage. Do not eat the egg, and discard it immediately. A cloudy white can sometimes be normal for older eggs, but a significant color change is a red flag.
Final Thoughts
Checking if a chicken egg is bad is a simple process. Use the float test in water, a quick sniff test after cracking, and a visual check of the yolk and white. Pay attention to the eggshell for any cracks or unusual textures.
Proper refrigeration extends freshness. Following these easy steps helps ensure you always enjoy safe and tasty eggs.
