How do I rescue hollandaise that has split?
Telling a split hollandaise from a scrambled one, cooling it before you rebuild, and the two-bowl rescue that brings back a sauce that has separated.
- Difficulty
- advanced
- Time
- 8 min
- Read
- 3 min
Short answer
If it has separated into butter and liquid but is still smooth, cool it first — whisk in an ice cube or stand the bowl in cold water — then rebuild it on a fresh yolk and a spoon of water in a clean bowl, adding the split sauce a teaspoon at a time. If it has visible grains of cooked egg, it is scrambled and cannot be brought back.
Hollandaise fails in two different ways and only one of them is recoverable. A split sauce has lost its emulsion — the butter has separated out — but the yolk is still liquid. A scrambled sauce has coagulated egg protein in it, visible as fine grains or lumps, and no whisking will undo that. Look at the sauce before deciding what to do.
Step by step
- Take it off the heat immediately and look at it closely.Smooth but separated, with a layer of clear butterfat: split, and recoverable. Granular, curdled-looking, with visible bits of set egg: scrambled. Strain a scrambled sauce and you may recover a thin butter sauce, but it will not be hollandaise again.
- Cool it before attempting anything.This is the step people skip. A split caused by overheating will split again immediately if you rebuild it hot. Whisk in one ice cube, or stand the bowl in a sink of cold water for a minute while whisking, until it is warm rather than hot.
- Try a tablespoon of cold water whisked in hard first.For a sauce that has only just broken, this alone often re-emulsifies it. Whisk vigorously for thirty seconds off the heat. If it comes back glossy, stop there and serve it straight away.
- If that fails, set up a clean bowl with a fresh yolk and a teaspoon of water.Whisk them together over the barely steaming pan for thirty seconds until slightly thickened, then take the bowl off the heat for the rebuild.
- Add the split sauce one teaspoon at a time until it thickens, then a tablespoon at a time.The first teaspoon is the whole rescue. If it goes thick and glossy, the rest will follow. Whisk each addition in completely before the next.
- Taste, and correct salt and lemon.You have added an unseasoned yolk and water, so the sauce is now flatter and slightly diluted. It will want more lemon than you expect.
Tips
- One ice cube is the classic first move and it works because it does two things at once — it cools the sauce and it adds water to the water phase.
- Do not add more butter to a hollandaise that looks thin. Thin means the emulsion is struggling; more butter is what breaks it.
- A stick blender will rebuild a split hollandaise very quickly in a narrow jug, and is worth reaching for if you are cooking for several people.
- A rescued hollandaise is more fragile than a fresh one. Serve it within a few minutes rather than holding it.
If it doesn't work
Suddenly turned thin and buttery with a clear layer on top
Cause: Overheated — the emulsion broke as the film around each butter droplet thinned — Fix: Cool it, then whisk in a tablespoon of cold water. If that fails, rebuild on a fresh yolk.
Fine grains through the sauce, looks curdled
Cause: The yolk went past about 85°C and coagulated — Fix: Not recoverable as hollandaise. Strain it, use it as a warm butter dressing over vegetables, and start again.
Thinned and split after standing on a warm hob
Cause: Held too hot for too long, which slowly destabilises the emulsion — Fix: Rebuild on a fresh yolk, then hold it in a warmed vacuum flask instead of over heat.
Split while the butter was going in, before it thickened
Cause: Butter added too fast, or the yolk base never reached the thickening stage — Fix: Rebuild on a fresh yolk taken properly to the ribbon stage first, then add the split mixture slowly.
Questions people ask
Why does cooling it first matter so much?
Because heat is usually the thing that broke it, and a rebuild done at the same temperature simply breaks again. Cooling to warm also brings the yolk back below the point where it will coagulate on contact with anything hot, which stops a split turning into a scramble while you are trying to fix it.
Can I save a scrambled hollandaise at all?
Not as hollandaise. Pass it through a fine sieve and you have a lemony butter sauce with a slightly grainy texture, which is fine poured over asparagus, broccoli or new potatoes and nobody will think it was a mistake. The egg cannot be un-cooked.