Bonnefoy Sauce, or White Bordelaise Sauce

Sauce Bonnefoy (white Bordelaise sauce) teaches the difference between reducing wine and merely boiling it away. The wine and shallots must arrive together at presque à sec, almost dry, while the shallots remain pale and glossy. That near-dry reduction is the one true thing to understand before you touch the pan. Leave too much wine and the finished sauce tastes loose; scorch the shallots and bitterness follows them all the way to the table.

The book's formula assumed a saucier at the stove, Velouté ready from stock never off the fire, and a tammy for the final straining. A salamander has no work here. Your honest equivalents are prepared Velouté, a small heavy saucepan, and a fine-mesh sieve. I have halved the quantities to make enough for four while keeping every proportion intact. The brigade's holding and repeated finishing were scaffolding and can go; the twenty-minute simmer, the sieving, and the off-fire butter are the dish itself and must stay. One cook, one stove, one evening.

When it is right, Sauce Bonnefoy is pale ivory with a butter gloss, a concentrated breath of Bordeaux, and small green sparks of tarragon. Mount the butter away from the fire and never let the finished sauce boil. Before you begin, choose a pan small enough for the wine to reduce without exposing the shallots to a broad, scorching floor.