How to Make a Pan Sauce — Deglazing
The browned bits left at the bottom of a pan after cooking meat or chicken — the fond — are a concentrated source of flavor and shouldn't be thrown away. After removing the meat, adding a little liquid to the pan (wine, water, broth) and scraping with a spoon — this is called deglazing — dissolves that fond into the sauce.
The sizzle and steam when the liquid hits the pan are normal; simmering it for a few minutes to reduce slightly, then whisking in a bit of butter, finishes the sauce. This is the fastest way to build a sauce from the very pan you cooked the meat in, without starting from scratch.
The Vinaigrette Ratio: 3-to-1
A classic vinaigrette is built on a ratio of 3 parts oil to 1 part acid (vinegar or lemon juice); this balances the weight of the oil against the brightness of the acid. For a sharper dressing you can push the ratio toward 2-to-1, but going below 1-to-1 makes the dressing nearly undrinkable with sourness.
Oil and acid naturally separate; adding a small amount of an emulsifier — mustard, honey or mashed garlic — holds the two together, keeping the dressing from splitting before serving.
Reducing to Thicken
Simmering a sauce or stock uncovered evaporates water and concentrates the flavor compounds left in the remaining liquid. This technique is called reduction; when the volume drops by half, the flavor can feel almost twice as strong.
Practical Tip
Before reaching for flour or starch to thicken a sauce, try reducing it first; this both concentrates the flavor and avoids leaving a raw-flour taste behind.
Yogurt-Based Sauces
When making a yogurt-based sauce, straining the yogurt through a sieve for 30 minutes before adding garlic, salt and fresh herbs removes excess water and noticeably thickens the sauce. Unstrained yogurt releases its water quickly and thins the sauce out.
Never add a yogurt-based sauce directly into a simmering dish; the sudden heat causes the yogurt to curdle and separate. Stirring a ladle of the hot liquid into the yogurt first to warm it, then adding it to the pot, avoids this problem.
Thickening a Sauce
To thicken a sauce quickly, 1 teaspoon of starch dissolved in cold water can be stirred slowly into a simmering sauce; the starch noticeably thickens the sauce within 1-2 minutes. Never pour starch directly into hot liquid — it clumps.
Whisking a few cubes of cold butter into a sauce right after taking it off the heat (monter au beurre) gives the sauce shine and a velvety texture; this step always comes last, and the sauce shouldn't be brought back to a boil once the butter is in.
A good sauce is defined by its technique, not its ingredient list — the same three ingredients, added in the right order, can produce an entirely different result.