When sherry has reduced to about a tablespoon, add truffle butter, if desired, and heavy cream.

I also liked the sirloin basted with truffle butter, but a special 24-ounce porterhouse was too fussy.

Instead, they order prefabricated truffle butters, oils and essences from a handful of suppliers.

Ms. Charles fetched a small plastic container of truffle butter from an under-counter refrigerator.

As a final touch, the fish is slicked with truffle butter and ringed by steamed vegetables.

When demi-glace is warm, add truffle butter, and stir until melted.

For $6 you will get saucisson with truffle butter and smoked duck breast with red wine jelly.

Some seem almost unfair, like the giant dome-shaped ravioli stuffed with a soft egg yolk and drowned in truffle butter.

Then came a dish served warm, a circle of scallops in a truffle butter.

Bring just to a simmer, remove from the heat and whisk in the truffle butter or remaining unsalted butter.