Chef Juliette
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Mutton Kidneys
Created by Chef Juliette
Based on No. 1329, Mutton Kidneys, from Le Guide Culinaire (1907) by Auguste Escoffier
Mutton kidneys sliced thin, seared hard in butter, drained briefly, and returned only after the glossy pan sauce is finished: the quick supper whose tenderness depends on never boiling.
Main Dishes
French
Weeknight
Quick Meal
Comfort Food
25 min
Active Time
15 min cook•40 min total
Yield4 servings
Rognons de mouton sautés (mutton kidneys quickly tossed in hot butter) teach one truth: the kidneys must cook faster than their sauce. Let the thin slices boil in liquid and their tender spring turns to rubber. Sauté them fiercely, drain them, build the sauce alone, then return them only after the heat is off.
The original entry offers two separate paths, grilled or sautéed. We take the sautéed path for tonight. Its brief instruction to swill the pan and finish the sauce assumed a saucier on staff and stock never off the fire; your honest equivalent is one wide skillet, a small measure of good stock, and cold butter whisked in at the end. The skewers and overhead grill belong to the other path, so there is no reason to imitate a salamander under the home broiler. One cook, one stove, one evening.
I've scaled the dish to eight kidneys for four people and kept what cannot change: the fine quarter-inch slices, fierce heat, short draining rest, and absolute refusal to boil them in the sauce. A separate sauce station was brigade scaffolding; the timing is the dish. Before you touch the pan, have the stock measured, the cold butter ready, and a sieve waiting beside the stove.
Rognons de mouton belong to the French tradition of abats, particularly the Parisian bistro and Lyonnais bouchon tables where the butcher's whole animal moved quickly from market to pan. Grand kitchens formalized two treatments already suited to household cooking, kidneys split and skewered for grilling or thinly sliced for the sauté, with the latter joined to a sauce made from its own pan. Draining the first-cooked slices was practical as well as culinary: kidneys from mature sheep can release sharply scented juices, and removing them keeps the finished sauce clear and balanced.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
mutton kidneys
Quantity
8 (about 1½ lb / 680 g total)
thin skin removed, halved, white cores trimmed, and sliced ¼ inch / 6 mm thick
unsalted butter
Quantity
5 tablespoons (75 ml / 70 g)
divided; keep the final 2 tablespoons cold and cubed
good low-sodium veal or beef stock
Quantity
¾ cup (180 ml / 180 g)
fine sea salt
Quantity
¾ teaspoon (4 ml / 4 g)
divided
freshly ground black pepper
Quantity
½ teaspoon (2.5 ml / 1 g)
| Ingredient | Quantity |
|---|---|
| mutton kidneysthin skin removed, halved, white cores trimmed, and sliced ¼ inch / 6 mm thick | 8 (about 1½ lb / 680 g total) |
| unsalted butterdivided; keep the final 2 tablespoons cold and cubed | 5 tablespoons (75 ml / 70 g) |
| good low-sodium veal or beef stock | ¾ cup (180 ml / 180 g) |
| fine sea saltdivided | ¾ teaspoon (4 ml / 4 g) |
| freshly ground black pepper | ½ teaspoon (2.5 ml / 1 g) |
Equipment Needed
- •12-inch / 30 cm heavy stainless-steel or cast-iron skillet
- •Fine sieve or colander set over a bowl
- •Small sharp trimming knife
- •Wooden spoon
- •Small whisk
Instructions
- 1
Trim and slice
Peel away every trace of the fine membrane surrounding each kidney. Split the kidneys lengthwise, lift out the hard white core and tubes with the point of a small knife, then cut across into slices ¼ inch / 6 mm thick. Keep the thickness even because uneven slices cannot finish together. Pat them thoroughly dry between clean towels; surface moisture prevents the fast sauté this dish requires.
The kidney should smell fresh and mineral, never sharply ammoniacal before cooking. Trimming and draining will tame a normal mature-kidney aroma, but they cannot rescue spoiled offal. - 2
Set the stove
Place a fine sieve or colander over a bowl beside the stove. Measure the stock, cube the cold finishing butter, and warm four plates. Season the kidney slices with the salt and pepper only now. Once the first batch meets the pan, there is no useful pause until the sauce is finished.
- 3
Sauté in batches
Heat a wide, heavy skillet over high heat. Add 1 tablespoon of the butter and let it foam, then turn hazelnut-gold. Add one-third of the kidneys in a single loose layer and sauté over fierce heat, tossing after about 45 seconds, until the surfaces are just firm and marked with brown at the edges, 75 to 90 seconds altogether. Transfer them immediately to the sieve. Repeat twice with the remaining sautéing butter. If a crowded batch releases a puddle, lift it out at once, pour that liquid into the draining bowl, return the empty pan to high heat, and continue with fewer slices. Ça se rattrape.
- 4
Drain the kidneys
Let the kidneys stand in the sieve for 3 to 4 minutes while you make the sauce. They will release ruddy juices, sometimes with the distinctly sharp aroma described in the original method. Discard those juices completely. Do not press the slices, and do not leave them waiting longer than the sauce requires.
- 5
Reduce the pan sauce
Pour off any excess butter from the skillet while preserving the brown fond stuck to its floor. Add the stock and bring it to a vigorous boil, scraping with a wooden spoon until every browned speck dissolves. Reduce to about ⅓ cup / 80 ml, 4 to 6 minutes. The liquid should taste concentrated and lightly coat the spoon, but it should not become salty or syrupy.
- 6
Monter au beurre
Take the skillet completely off the heat. Monter au beurre, mount the sauce with cold butter, by whisking in the final 2 tablespoons a few cubes at a time until the sauce turns glossy and softly thickened. If it looks greasy or separates, whisk in 1 teaspoon of cold stock away from the heat. Ça se rattrape. Taste before adding any further salt.
- 7
Return without boiling
Add the drained kidneys to the finished sauce and toss off the heat for 20 to 30 seconds, just long enough to glaze every slice. If they have cooled too far, set the pan over the lowest heat for no more than 10 seconds while tossing continuously. The sauce must not simmer. Never let the kidneys boil in it, because they will harden immediately.
- 8
Serve at once
Divide the kidneys among the warm plates and spoon over every drop of the butter-glossed pan sauce. Serve immediately, with purée de pommes de terre or thick country bread ready to catch the sauce. This dish waits for nobody. À table!
Chef Tips
- •Order mutton kidneys from a butcher and cook them on the day you collect them. Their flavour should be deeper than lamb kidney but still fresh and mineral; a sharp ammonia smell in the raw kidney means you change the plan, not the standard.
- •Use a 12-inch / 30 cm stainless-steel or well-seasoned cast-iron skillet. The kidneys need open space and a pan that holds fierce heat, while the metal surface provides the fond that becomes the sauce.
- •Serve with purée de pommes de terre or toasted country bread, nothing fussy. A peppery northern Rhône Syrah has enough freshness and savoury character for the kidney without bullying the buttered sauce.
- •Rognons de mouton sautés are poor leftovers because reheating tightens them. If any remain, chill them promptly and eat them cold the next day with mustard and bread rather than boiling them through a second sauce.
Advance Preparation
- •The kidneys may be skinned, trimmed, and sliced up to 4 hours ahead. Lay them between clean absorbent towels, cover, and keep refrigerated until the pan is ready; season only immediately before cooking.
- •Measure the stock, cube the finishing butter, arrange the draining sieve, and warm the plates before beginning the sauté. This preparation is what makes the quick sequence calm.
- •Do not cook the kidneys or finish the sauce ahead. Their tenderness lasts minutes, not hours, so the finished dish must go directly from pan to table.
Frequently Asked Questions
Nutrition Information
1 serving (about 155g)
Calories
280 calories
Total Fat
19 g
Saturated Fat
10 g
Trans Fat
1 g
Unsaturated Fat
7 g
Cholesterol
555 mg
Sodium
690 mg
Total Carbohydrates
2 g
Dietary Fiber
0 g
Sugars
0 g
Protein
25 g
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