Atlantic Seabass: Yuzu Beurre Blanc and a Skin That Has to Be Crisp

Most menu lines describe a dish. Ours reviews it. The seabass reads: yuzu beurre blanc, miso butter, ikura, bloody crispy skin — and that last phrase is a promise printed in advance, in front of every guest, which is a slightly reckless thing for a kitchen to do. Soft skin is not a matter of opinion. Anybody can check.

So this is the dish where the technique is the point, and the sauces are the part that makes the technique harder rather than easier.

Why fish skin goes soft, and what stops it

Skin cannot brown while it is wet. Water has to leave the surface before the temperature there can climb high enough for browning to start, and until then the pan is essentially steaming the fish. Every rule about crisp skin comes back to that one fact.

Which is why the surface has to be dry before the fish goes anywhere near heat, why the surface it meets has to be properly hot rather than warming up underneath it, and why the skin side takes most of the exposure — you are not cooking the fillet through so much as driving water out of one face of it while the rest gently comes along behind.

Then there is the curl. Skin contracts faster than flesh does when it hits heat, so a fillet left to its own devices lifts at the edges and the middle stops making contact. Half the skin crisps and half of it steams. The fix is unglamorous: keep it flat until it has set. Nothing about crisp skin is a trick. It is attention, applied for a few minutes, to something that will punish you for looking away.

Beurre blanc, and what it actually is

Beurre blanc is a butter emulsion from the Loire, usually credited to a cook called Clemence Lefeuvre working near Nantes around the turn of the last century. The method is short enough to write in a sentence: reduce something acidic with shallot until there is almost nothing left, then whisk in cold butter, piece by piece, off aggressive heat.

What you are making is an emulsion — butterfat suspended in a very small amount of liquid — and it is held together by temperature and agitation rather than by any stabiliser. Too hot and it splits into oil and water in front of you. Too cold and it seizes. It is one of the classic French sauces that has no margin in it, and there is a reason it belongs to fish: it is rich without being heavy, and it carries acid straight to something that needs acid.

What yuzu does to it

Yuzu is a Japanese citrus, and describing it as a lemon substitute undersells it badly. It is sour, but its real contribution is aroma — floral, with something of grapefruit and mandarin about it — and that aroma is concentrated in the skin more than in the juice, which is why Japanese kitchens use the zest so freely.

In a beurre blanc, that changes what the acid is doing. A wine-and-vinegar reduction gives sharpness and not much else. Yuzu gives sharpness plus a perfume that survives being whisked into a large quantity of butter, and butter is very good at carrying aromatics — it is fat, and most aroma compounds are happier in fat than in water. The sauce ends up smelling of citrus long before it tastes of it.

It is also the single cleanest example on our menu of the swap we keep making: take a technique that is completely French, change only the acid, and let a Japanese ingredient do a job the original was already asking someone to do.

Two butters, and why that is not a mistake

Miso butter is the second one, and it is a different kind of thing. A beurre blanc is a sauce; miso butter is a seasoning — fermented soybean paste worked into butter, bringing salt and a deep savouriness that the sauce, being mostly citrus and dairy, does not have.

Between them they cover the two halves of the problem. The beurre blanc handles acid and richness. The miso handles salt and depth. Fish is mild, and mildness needs both, or the plate is either bright and thin or rich and flat.

The roe on top

Ikura is salmon roe, cured in salt and usually soy, and its job here is punctuation: individual bursts of salinity across a fillet that is otherwise uniformly soft. Texture first, seasoning second.

It is also the third roe on our menu, which is not a coincidence so much as a habit — ikura sits on the chickpea hummus, and tobiko and mentaiko turn up in the taramasalata. Cured roe is one of the few ingredients that belongs equally to a Japanese pantry and a Mediterranean one, so it does a lot of quiet work in a kitchen like ours.

The argument at the centre of the plate

Here is the honest tension in this dish: crisp skin and butter sauce are natural enemies. Anything you crisp by removing water can be un-crisped by putting water back, and a beurre blanc is largely butter with a little liquid in it. Pour it over the top and the promise on the menu has about ninety seconds to live.

Which is why a sauce like this belongs around a fillet rather than across it, and why we would tell you the same thing we would tell a cook: eat the skin side early. Do not let the fish sit in its sauce while you go back to the mezze. That is not a fussy instruction — it is the difference between the dish you ordered and a slightly worse one that used to be it.

The one big plate that is not meat

Look down our biggies and it is charcoal chicken, pork collar, lamb rump, ribeye, wagyu karubi — and this. The seabass is the only main on the list that is not meat, which makes it the useful order in two situations: when somebody at the table does not eat meat, and when everybody does but the table has already gone very heavy on smoke and needs a plate that resets it.

That second case is more common than the first. A table that has worked through charred sprouts and a lamb dish wants something bright next, not another lap of the same fire.

How to order it

Order it to arrive after the mezze rather than alongside it — the sauce and the skin both have a short window and neither improves while you finish a dip. Anything acidic and cool works well beside it; the labne in particular sits well against citrus butter.

If you would rather not decide, the FEEEEED ME chef’s-choice menu takes the ordering out of your hands entirely. The whole method, if you want to do it yourself, is in what to order at a Japanese-Middle Eastern table, and the full list is on the menu.

Where to eat it

We are at 29 Hamilton Road, Singapore 209198, in Jalan Besar — Tuesday to Sunday, 5pm to 11pm, with brunch on Saturday and Sunday from 11am to 2.30pm. There are pictures of the kitchen and the fire in the gallery, and the longer story of the restaurant is in five years of Habibi-san. Our Haji Lane sibling Li’l Habibi runs its own fish plate, chargrilled mackerel kebabs, which is a different proposition entirely.

If you are coming for the seabass, book a table — and hold us to the menu.