Which finishing technique involves emulsifying fat to create a glossy surface on a sauce?

Which finishing technique involves emulsifying fat to create a glossy surface on a sauce?

• A. Reducing to a glaze
• B. Mounting with butter
• C. Deglazing with stock
• D. Thickening with cornstarch

Answer: (D)

Finishing with butter emulsifies fat into the sauce, creating a smooth, glossy surface. When you whisk in small pieces of cold butter off the heat, the fat disperses as tiny droplets in the liquid, forming a stable emulsion that coats the sauce and gives it a bright sheen. This technique also enriches flavor and helps stability, producing that polished, restaurant-style finish. Reducing to a glaze just concentrates moisture and flavor without creating a fat-emulsified gloss. Deglazing with stock adds liquid to lift the browned fond, not a fat glaze. Thickening with cornstarch increases viscosity through starch gelatinization, not by fat emulsification, so it won’t yield the same glossy finish.

Finishing with butter emulsifies fat into the sauce, creating a smooth, glossy surface. When you whisk in small pieces of cold butter off the heat, the fat disperses as tiny droplets in the liquid, forming a stable emulsion that coats the sauce and gives it a bright sheen. This technique also enriches flavor and helps stability, producing that polished, restaurant-style finish. Reducing to a glaze just concentrates moisture and flavor without creating a fat-emulsified gloss. Deglazing with stock adds liquid to lift the browned fond, not a fat glaze. Thickening with cornstarch increases viscosity through starch gelatinization, not by fat emulsification, so it won’t yield the same glossy finish.