Who hasn't experienced that moment of doubt in the kitchen? You take eggs out of the fridge and can't to know if they are cooked/firm or still raw
This is a very common situation! We often boil a few eggs in advance to save time, storing them in the same place as the raw eggs. A few days later, it's hard to tell the cooked ones from the raw ones.
Fortunately, there is a simple and quick way to tell if an egg is hard-boiled or raw without breaking its shell. This is what we invite you to discover in this article thanks to the egg-spinning technique.
The egg-turner's trick
This method is based on a very simple physical principle. For the method to be reliable, you must apply the same force to the different eggs you are testing. Here's how to do it.
- Place it flat on the work surface.
- With your fingertips, spin it like a top.
- Observe its rotation for a few seconds.
- Repeat the gesture in the same way for each egg.
How to interpret what you see
It's the egg's behaviour on the table that gives you the answer.
- If the egg Turns easily, quickly, and fairly regularly, that it completes several laps without stopping, it's a Hard-boiled egg. The interior is solid and does not interfere with rotation.
- If the egg difficulty turning, it wobbles, only manages a few clumsy turns and then stops or stays almost still, you're dealing with a raw egg. The interior, still liquid, slows the movement.
Here's a quick summary table to help you remember the difference more quickly.
| Type of egg | Behaviour when spun | Interpretation |
|---|---|---|
| Boiled egg | Spin quickly, for a long time, quite regularly and balanced | Solid interior, full cooking |
| Raw egg | Flickers, spins little, stops quickly or remains almost still | Liquid interior that disrupts movement |
Keep a simple sentence in mind: He who turns well is cooked, he who wavers is raw.
This tip is ideal for avoiding waste and making the most of every egg. You may be wondering How to check if an egg is still fresh or edible Discover our practical tips in this dedicated article.
FAQ
How to tell if an egg is cooked without breaking it?
Spin it on a flat surface: a hard-boiled egg spins quickly and smoothly, while a raw egg wobbles and stops quickly.
Why does a raw egg go bad?
Because its liquid interior moves independently of the shell. This lag slows rotation and creates an imbalance.
