Too many home cooks are frightened of this sauce
This sauce has a stigma of being technically difficult. It isn't. But….there are five ingredients and one technique, and the technique is whisking.
What béarnaise is, is unforgiving of heat. Egg yolk proteins set somewhere around 160–180°F, and this sauce lives just below that line. Go over it and the yolks scramble; there's no recovering that. Everything people call "difficult" about béarnaise is really one variable being managed badly.
Control the heat and it's a fifteen-minute sauce. I'll give you the classic method and a simpler blender version, and the rescue for when it breaks.
What it actually is
An emulsion of egg yolk and butter, sharpened with a reduction of vinegar, wine, shallot and tarragon.
Hollandaise is the sibling. If you’ve had eggs benedict you’ve had the same emulsion, but in that case the acid is lemon juice and there's no reduction. Béarnaise is hollandaise with an opinion: the tarragon-and-vinegar reduction is what makes it a beef sauce rather than an egg-and-asparagus sauce. Tarragon has a faint anise note that does something magical with beef, and there's no good substitute for it. If you can't find tarragon, make something else.
The recipe: béarnaise
Makes about 1 cup, enough for 4 · 20 minutes
The reduction
- ¼ cup white wine vinegar
- ¼ cup dry white wine
- 1 shallot, finely minced
- 2 tbsp tarragon stems, chopped — save the leaves
- 1 tsp black peppercorns, cracked
The sauce
- 3 large egg yolks
- 1 tbsp cold water
- 8 oz (2 sticks) unsalted butter, melted and warm — clarified if you want it richer and more stable
- 2 tbsp fresh tarragon leaves, chopped
- 1 tbsp fresh chervil or parsley, chopped
- Lemon juice, to finish
- Kosher salt
Method
- Reduce. Simmer the vinegar, wine, shallot, tarragon stems and peppercorns until about 2 tablespoons of liquid remain, 6–8 minutes. Strain, pressing the solids hard. Let it cool to warm. (This keeps a week in the fridge, and it's most of the work — see "make it ahead" below.)
- Set up a bain-marie. A metal or glass bowl over a saucepan with an inch of barely simmering water. The bowl must not touch the water. If the water is rolling, your sauce will scramble. Turn it down until you can barely see movement.
- Whisk the yolks, cold water and the cooled reduction in the bowl, off the heat, until pale and foamy. Thirty seconds of work that makes the next step easier.
- Set the bowl over the water and whisk constantly for 3–5 minutes until it reaches the ribbon stage — lift the whisk and the sauce falls back in a ribbon that holds its shape for a second or two before sinking in. It should roughly triple in volume and look like a pale, glossy foam. If the bowl ever feels properly hot to a finger touched to the outside, lift it off the heat for 20 seconds and keep whisking. You can always put it back.
- Off the heat, drizzle in the warm butter in a thin stream, whisking the whole time. Slowly at first — the first ounce is where emulsions break, and once you're a third of the way in you can speed up considerably. If you're using whole melted butter rather than clarified, leave the milky solids behind in the bottom of the pan.
- Finish with tarragon, chervil, a squeeze of lemon and salt. Taste it. It should be sharp enough to make you sit up, if it tastes only of butter, it needs salt and acid.
- Hold it somewhere warm but not hot, near the stove, not on it, or in a thermos or cooler for up to an hour.
The blender version
For when it's a Tuesday and you want the fancy sauce anyway.
Yolks, cold water and the cooled reduction into a blender. Blend 20 seconds. Then, with the motor running, pour the hot melted butter, properly hot, around 180°F, because here the heat of the butter is what cooks the yolks. Ninety seconds start to finish. Season, add the herbs, pulse once.
It's slightly denser and less airy than the whisked version but it is also very nearly foolproof.
When it breaks: the fresh-yolk rescue
A broken sauce looks curdled and greasy, with visible fat separating out. It is not ruined and you do not throw it away.
Put a fresh egg yolk and a teaspoon of cold water in a clean, warm bowl. Whisk until frothy. Then drizzle the broken sauce into it a spoonful at a time, whisking hard, exactly as though the broken sauce were the butter. It re-emulsifies. You'll end up with slightly more sauce than you started with, which is a strange sort of bonus.
For a mild split — it looks thin and a little loose rather than fully curdled. A tablespoon of boiling water whisked in hard will often pull it back together without the extra yolk.
What cannot be rescued is scrambled. If you see solid flecks of cooked egg, the yolks set and there's nothing to emulsify. Strain it and start again, and turn the heat down this time.
Making it ahead
The finished sauce can't be refrigerated and reheated. That's a property of the emulsion, not a failure of your technique.
But the reduction keeps for a week, covered, in the fridge, and the reduction is genuinely most of the work. Make it Sunday, and Thursday's béarnaise is a ten-minute job.
A thermos holds finished béarnaise well for an hour or two if you're cooking for people and want it done early.
If you can't eat dairy
I'll be straight with you: there is no good dairy-free béarnaise. The sauce is an emulsion of egg yolk and butter, and the butter is not a flavoring you can swap — the butter is half the structure.
Two options:
Ghee, if what you're avoiding is lactose rather than dairy as a category. Clarified butter has had the milk solids removed, it's what a lot of professional kitchens use for this sauce anyway, and it makes a more stable emulsion than whole butter.
Or skip the emulsion and keep the flavor. The tarragon reduction is where the character of this sauce lives, and it's dairy-free on its own. Make it as written, then whisk it with three tablespoons of olive oil, a teaspoon of Dijon and the chopped tarragon and chervil. That's a tarragon vinaigrette, it takes eight minutes, and spooned over a rested filet it delivers a surprising amount of what you came for. It is not béarnaise…but it’s good.
What to put it on
Filet mignon, a classic pairing, and the leanest cut on the animal is the one that benefits most from a butter emulsion.
Also: a New York strip, asparagus, poached eggs, and — this is the one people don't expect — it’s good with fries.
Quick answers
What is béarnaise sauce? A warm emulsion of egg yolk and butter, flavored with a reduction of white wine vinegar, white wine, shallot and tarragon. It's the classic French sauce for beef tenderloin.
How do you fix broken béarnaise? Whisk a fresh egg yolk with a teaspoon of cold water in a clean warm bowl, then drizzle the broken sauce into it a spoonful at a time, whisking, as if it were butter. For a mild split, a tablespoon of boiling water whisked in hard usually works.
What's the difference between béarnaise and hollandaise? Both are egg-yolk-and-butter emulsions. Hollandaise is acidified with lemon juice; béarnaise uses a reduction of vinegar, wine, shallot and tarragon, which makes it a beef sauce rather than an egg sauce.
Can you make béarnaise ahead? Not the finished sauce — it can't be refrigerated and reheated. The reduction keeps a week in the fridge, and that's most of the work.
Can you make béarnaise without dairy? Not really. Ghee works if you're avoiding lactose rather than dairy. Otherwise, make the tarragon reduction and turn it into a vinaigrette with olive oil and Dijon — different sauce, same flavor family.