Hazel-nut Sauce

Sauce aux Noisettes teaches the quiet power of infusion. Hazelnuts merely stirred into finished custard taste added; hazelnuts toasted until their aroma fills the kitchen, then left to steep in milk, make the whole sauce taste born of the nut. It should fall from a spoon in an ivory ribbon, glossy and deeply roasted, never gritty.

The original entry assumed crème anglaise waiting at the saucier's elbow, hazelnuts grilled under a salamander, and Pralin (No. 2352) prepared in quantity by the pastry section. At home, a rimmed baking sheet replaces the salamander, one saucepan builds the custard, and a fine sieve finishes the infusion. That brigade scaffolding can go. The dish cannot: toasted-nut infusion first, then two tablespoonfuls of Pralin (No. 2352) for each quart of custard. This batch keeps that ratio and scales the work to about two quarts for one cook, one stove, one evening.

The one step that decides it happens before the yolks meet heat. Toast the hazelnuts to old gold, stopping the moment they smell like the finished sauce. Pale nuts give the milk a polite whisper; blackened nuts give bitterness no sugar can hide.