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Finishing a sauce with cold butter
Intermediate Sauces and stocks
Finishing a sauce with cold butter is whisking or swirling cold butter into a hot sauce off the heat to make it glossy and slightly thicker.
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How do you do it?
- Reduce your sauce first, then pull the pan off the heat.
- Add cold butter in tablespoon-size pieces, swirling or whisking until each one melts in.
- Stop when it looks glossy and creamy, then serve right away.
Why does it work?
Cold butter melts slowly, so its fat breaks into tiny droplets that stay suspended in the liquid, helped by its milk proteins. That emulsion gives body and shine. Too much heat melts it into a greasy layer instead.
What are the common mistakes?
- Adding butter over high heat — the sauce breaks and looks oily.
- Reboiling it afterward — the emulsion splits.
Still stuck? Watch someone do it on YouTube.
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