Mastering the Stock Reduction
A good stock contains the essence of your ingredients, but it often lacks the reach to carry a dish on its own. By removing the excess water, you shift the texture from liquid to syrup, creating a component that commands attention rather than fading into the background.
Patience is your primary ingredient
Avoid the urge to boil aggressively, as this emulsifies fats and clouds the stock. Keep the surface at a gentle shiver where bubbles break the surface occasionally.
- Wide, shallow saucepan
- Skimmer or fine-mesh sieve
- Heat-resistant spatula
What goes in.
- 4 cupsHouse-made chicken, beef, or vegetable stock
Checking for viscosity
Dip a metal spoon into the pot and run a finger across the back. If the line holds clean and the liquid clings to the metal, the reduction is finished.
The method.
Select the right vessel
Use a wide, shallow pan rather than a tall pot. The increased surface area allows steam to escape more efficiently, cutting your reduction time in half.
Simmer steadily
Bring the stock to a boil, then immediately drop the heat to low. Maintain a simmer so the stock ripples but does not roll.
Skim the surface
Periodically run a spoon or small mesh strainer across the top to remove the white foam or floating impurities that rise during the concentration process.
Watch the volume
Continue simmering until the stock has reduced by at least three-quarters of its original volume. It should look like a dark, glossy syrup.
Other turns to take.
Deglazing Reduction
After searing meat, pour the stock into the hot pan and scrape up the browned bits, simmering until the liquid thickens into a pan sauce.
Demi-Glace
Combine equal parts brown stock and espagnole sauce, then reduce until the mixture is thick enough to coat a spoon heavily.
When it doesn't go to plan.
Do not salt your stock before reducing; the concentration process will multiply the salinity, leading to an inedible end product.
If the stock turns murky, turn the heat to the lowest possible setting; clear stock is often a result of temperature management.
Store the finished reduction in ice cube trays in the freezer to have concentrated flavor boosters ready for future cooking.
The ones that keep coming up.
How do I know when to stop?
Stop when the liquid is syrupy and coats the back of your spoon. If you reduce it further, you risk burning the sugars and turning it bitter.
Why is my reduction tasting bitter?
You likely reduced it too far or had the heat too high. If it gets to the point of being a dark, sticky paste at the bottom of the pan, you have gone too far.
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