🐟 Professional Kitchen · Sauces
Chicken Butter Emulsion for Market Fish
Reduced chicken stock and glossy butter emulsion combine into a deeply savoury lemon sauce for market fish.
Behind the plate
Chicken stock and fish are a classic professional-kitchen pairing when the stock is clean, well reduced and used with restraint. It supplies savoury depth without covering the character of the fish.
There is intentionally no fixed stock-to-butter ratio in the original formula. The cook reduces the stock for concentration, then adds the master emulsion gradually until the sauce coats a spoon and tastes balanced.
Why this recipe works
Reduction concentrates the natural gelatin in the chicken stock, giving the sauce body before any butter is added. The master emulsion supplies gloss and richness, while two lemon juices sharpen the finish for fish.
The recipe
Ingredients
- Chicken stock, as needed
- Master butter emulsion, as needed
- 30 g lemon juice
- 15 g pickled lemon juice
- Fine salt, to taste
Method
- Prepare the Master Butter Emulsion and keep it warm over very gentle heat.
- Pour the chicken stock into a separate clean saucepan and reduce over medium heat until concentrated and lightly thickened.
- Lower the heat. Whisk in the warm master emulsion gradually until the sauce is glossy and coats the back of a spoon.
- Add the lemon juice and pickled lemon juice, then season carefully with salt.
- Blend briefly if needed for a perfectly smooth finish. Keep warm without boiling and spoon around freshly cooked market fish.
Chef’s notes
- The stock and master-emulsion quantities are intentionally judged by reduction strength and final consistency.
- Use a clean, lightly seasoned chicken stock so it supports rather than masks the fish.
- Add the butter base only after the stock has reduced; reducing the combined sauce aggressively can split it.
- Make the final acidity adjustment after seasoning because salt changes how sharply the lemon reads.
At the table
Serve with roasted or pan-fried white fish, turbot, cod or hake. Add steamed greens, leeks or peas and spoon the sauce around the fish just before it leaves the pass.