Classic French Oeuf Mollet (Soft-Boil Temp Guide)

For a classic œuf mollet, lower large, refrigerated eggs (about 4°C / 40°F) into gently boiling water and cook for 6 minutes 30 seconds, timing from immersion. Move them carefully into an ice bath for at least 5 minutes. The white should be set and the yolk soft and creamy; size, altitude, and boil recovery can change the result.

A soft-boiled egg can go from just right to overcooked while you are still deciding whether it is done. The key is to control the starting temperature, water, and timing, then cool the egg promptly. In my cooking classes, I find that starting the timer before every egg is in the water is a common source of uneven results.

An œuf mollet is a French soft-boiled egg with a fully set white and a tender, creamy yolk. The method below gives you a reliable starting point, explains what can shift the timing, and shows how to peel and serve the egg without tearing its delicate white.

Cookware Setup and Egg Preparation

A stable setup makes the timing easier to repeat. Use a saucepan that gives the eggs room to sit in one layer, enough water to cover them, and a prepared ice bath. A sound stainless-steel or enameled pot works on compatible stovetops; induction requires a pot with a magnetic base.

Choose large eggs straight from the refrigerator, about 4°C / 40°F, for the timing in this guide. If your eggs are smaller, extra-large, or have been sitting at room temperature, expect the result to differ. The stated time is a practical baseline for large, chilled eggs, not a guarantee for every egg and stove.

Prepare the pot and ice bath

An ice bath is a bowl of cold water with plenty of ice that cools eggs quickly after cooking. Set it up before heating the pot so the eggs can go straight from hot water to cold water. This stops carryover cooking, when heat inside the egg continues to cook it after it leaves the pan.

• Choose a saucepan large enough to avoid crowding the eggs.
• Add water to cover the eggs by about 2.5 cm / 1 inch.
• Fill a bowl with cold water and ice. Keep it beside the stove.
• Have a slotted spoon or serving spoon ready to lower and lift the eggs.

The pot material does not set the cooking time by itself. What matters most is that the pot can safely hold enough water, maintain a gentle boil, and fit the burner or cooking zone. On induction, check that the base attracts a magnet and that the pot is compatible with your hob.

Timed Cooking and Ice-Bath Execution

The method depends on timing from immersion, not from when the water first boils. Bring the water to a gentle boil, lower the cold eggs in carefully, start the timer once all are submerged, and cook for 6 minutes 30 seconds. Then transfer the eggs gently to the prepared ice bath for at least 5 minutes.

Control the boil and start the timer

A gentle boil means steady bubbling without violent movement that knocks eggs into the pan. At sea level, water boils at about 99–100°C / 210–212°F. Lower the eggs with a spoon rather than dropping them, then begin timing when all eggs are in the water.

Maintain a gentle boil for the full 6:30. If adding several eggs makes the bubbling stop briefly, the water needs time to recover. The precise effect depends on the pot, burner, and amount of water, so use the same setup when you want repeatable results. Avoid crowding, which can slow recovery and make it harder to lift eggs safely.

A vigorous boil can crack shells when eggs strike the pan. Cracks may let white leak into the water and can affect the finished egg. If the water is churning, reduce the heat enough to keep the bubbles steady but controlled.

Chill without cracking

Chilling quickly limits continued cooking and helps separate the shell from the egg. When the timer ends, lift each egg with a spoon and place it gently into the ice bath. Do not drop hot eggs into the bowl or let them collide with one another.

Leave the eggs in the bath for at least 5 minutes. If the water stops feeling cold because the eggs have warmed it, add more ice. Once chilled, the eggs are ready to peel or store.

Temperature Guide and Timing Adjustments

For this method, the useful temperature is the water’s, not a target internal temperature for the yolk. Keep the water near its local boiling point and use the stated time as a starting point. At altitude, boiling water is cooler than it is at sea level, so a fixed time may not produce the same doneness.

At sea level, the gentle-boil range is about 99–100°C / 210–212°F. A kitchen thermometer can help you understand the water, but visible gentle bubbling is usually the practical cue. Do not assume that water at a lower temperature will cook an egg identically in the same time.

Egg size and starting temperature also matter. A cold egg takes longer to warm than a room-temperature egg, and a larger egg contains more to heat. For consistency, use large eggs straight from the refrigerator and repeat the same pot, water level, and number of eggs.

Adjust by testing, not guessing

A test batch is a small trial cooked with the same conditions as the eggs you plan to serve. It helps you account for changes in egg size, altitude, and stove performance without relying on an unsupported universal adjustment. Cook one or two eggs, chill them, and check the white and yolk before making a larger batch.

If the white is not fully set, add a short amount of time to the next test. If the yolk is firmer than you want, shorten the next test slightly. Change one factor at a time so you can tell what helped. Keep a brief note of egg size, starting temperature, quantity, and timing.

At high altitude, do not rely on a fixed time without testing. Because boiling temperature falls as altitude rises, cooking conditions differ from those at sea level. There is no single adjustment that fits every altitude and stove, so test the result with your own setup.

Peeling, Storage, and Cookware Care

Peeling is easiest after the egg has cooled in the ice bath. Tap the shell gently to make small cracks, roll it lightly on the counter, then peel. If the shell clings, peel the egg under a thin stream of water or in a bowl of water to help loosen small pieces.

Start near the broader end if the shell has an air pocket there, but do not force the peel. The white is delicate, so work slowly and keep the egg supported in your hand. A rough peel can tear the surface even when the cooking time was right.

For later service, refrigerate cooked eggs promptly and keep them at 4°C / 40°F or colder. Keep them protected from contamination and serve them promptly. Follow local food-safety guidance for storage and handling; do not leave cooked eggs sitting out for an extended period.

After cooking, let the saucepan cool before washing it. If egg white has leaked from a cracked shell, soak the pot in warm water to loosen residue rather than scraping hard at the surface. Use care around the stove and hot water, and lift eggs with a tool instead of reaching into the pan.

Serving and Dining Presentation

A peeled œuf mollet is often served whole or cut in half to show its soft yolk. It can top a salad, sit on toast, or accompany a simple meal. Cut it just before serving with a clean knife, since the yolk may flow when the egg is opened.

For a tidy plate, dry the peeled egg gently with a clean towel before placing it on food. If the egg will be served warm, avoid leaving it in hot water after its cooking time; that continues to cook the yolk. The ice bath gives you a pause point, so peel and serve when ready.

Two common cooking scenarios

The same timing can behave differently when the number of eggs or the water recovery changes. These examples show how to diagnose the setup rather than changing several variables at once. Use them as practical checks, then confirm the result with a test egg.

• One egg in a small pot: The water may return to a gentle boil quickly. Still start the timer only after the egg is immersed, and watch for steady bubbling.
• Several eggs for a meal: Use a larger pot and enough water to cover them by 2.5 cm / 1 inch. Lower them one by one, avoid crowding, and note whether the boil takes time to recover.
• A cracked egg leaks into the water: Check whether it was lowered gently and whether the boil was too vigorous. For the next batch, reduce the bubbling and avoid eggs striking the pan.

Food Safety and Who Should Avoid Soft Yolks

A soft yolk may not reach a temperature that makes it safe for everyone. The FDA advises cooking egg dishes to 160°F / 71°C. Because a soft-boiled yolk may not reach that temperature throughout, people at higher risk of foodborne illness should choose pasteurized shell eggs or eggs cooked until firm.

This advice is especially important for pregnant people, older adults, very young children, and people with weakened immune systems. Pasteurized shell eggs have been treated to reduce the risk from harmful bacteria, but handle and store them as directed on the package. When serving a mixed group, ask about dietary needs and offer a fully cooked option.

Frequently Asked Questions

These quick answers cover the most common timing, temperature, and handling questions for a French soft-boiled egg. The baseline assumes large eggs taken from a refrigerator and cooked at sea level. If your conditions differ, test a batch and adjust based on the white and yolk.

How long do I cook an œuf mollet?
Cook a large, refrigerated egg for 6 minutes 30 seconds, timed from immersion in gently boiling water.

What temperature should the water be?
At sea level, maintain a gentle boil at about 99–100°C / 210–212°F. Water boils at a lower temperature at altitude.

Should I start the timer when I lower the first egg?
Start when all the eggs are immersed. This keeps the timing consistent across the batch.

Do I put the eggs into boiling water or cold water?
For this method, lower refrigerated eggs carefully into gently boiling water with a spoon. Do not drop them.

How long should the ice bath last?
Chill the eggs for at least 5 minutes. This limits carryover cooking and helps with peeling.

Why did my egg crack in the pot?
A shell can crack if it hits the pan or another egg, or if a vigorous boil makes it move around. Lower eggs gently and keep the water at a controlled boil.

Can I use extra-large or small eggs with the same time?
The result may differ because egg size affects how quickly the center heats. Test a small batch instead of assuming the same timing will work.

How should I adjust the time at high altitude?
There is no single reliable adjustment for every altitude and stove. Boiling water is cooler at altitude, so test eggs with your setup and adjust based on the result.

Can I make these eggs ahead?
Yes. Chill them promptly, refrigerate at 4°C / 40°F or colder, and keep them protected until serving. Serve promptly after peeling.

Are soft-boiled eggs safe for everyone?
No. A soft yolk may not reach the FDA’s 160°F / 71°C guidance for egg dishes. Higher-risk diners should choose pasteurized shell eggs or eggs cooked until firm.

The Reliable Method in Brief

A classic result comes from a steady process: use large chilled eggs, cover them with water, maintain a gentle boil, time 6:30 from immersion, and chill them in ice water for at least 5 minutes. Lower eggs carefully, avoid crowding, and test when size or altitude changes. If a soft yolk is not suitable for the diner, cook the egg until firm or use pasteurized shell eggs.

(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)