Equipment
Ingredients
Base Aromatics
- 30 g unsalted butter, cubed
- 1 shallot, finely minced
- 60 ml dry white wine
Greens & Cream
- 150 ml heavy cream, room temperature
- 100 g fresh sorrel, stems removed, roughly chopped
- 50 g fresh baby spinach, roughly chopped
Seasoning
- 3 g kosher salt
- 1 g white pepper, finely ground
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 140 kcal
- Protein
- 2 g
- Carbohydrates
- 3 g
- Fat
- 13 g
- Fiber
- 1 g
- Sugar
- 1 g
- Sodium
- 209 mg
- Saturated Fat
- 8 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 3 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 39 mg
- Potassium
- 101 mg
- Calcium
- 40 mg
- Iron
- 0.4 mg
- Magnesium
- 11 mg
- Phosphorus
- 26 mg
- Zinc
- 0.1 mg
- Vitamin A
- 376 mcg
- Vitamin C
- 11 mg
- Vitamin D
- 0.4 mcg
- Vitamin E
- 0.5 mg
- Vitamin K
- 41 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.1 mcg
- Thiamin
- 0.02 mg
- Riboflavin
- 0.07 mg
- Niacin
- 0.1 mg
- Folate
- 20 mcg
- Water
- 37 g
- Alcohol
- 1 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Melt the butter in a stainless steel saucepan over medium heat. Add the minced shallots and sweat them gently until translucent and tender, about 3 minutes. Do not let them brown.
Pour in the dry white wine to deglaze the pan. Allow the wine to simmer and reduce by half, which will concentrate the flavors and cook off the raw alcohol.
Whisk in the heavy cream. Reduce the heat to medium-low and simmer gently for 4 minutes until the liquid thickens slightly and coats the back of a spoon. Do not let it boil vigorously.
Add the chopped sorrel and baby spinach to the simmering cream. Stir constantly for about 1 minute just until the leaves melt into the sauce. The sorrel will immediately turn a drab olive color, but the spinach will provide a bright green tint.
Transfer the hot mixture to a blender. Puree on high speed for 60 seconds until completely smooth and vibrantly green. Alternatively, use an immersion blender directly in the pot.
Return the pureed sauce to the saucepan off the heat. Season with kosher salt and white pepper, stirring well. Let it rest for 5 minutes to allow flavors to meld before serving.
Chef's Notes
- Sorrel is packed with oxalic acid, which gives it its signature lemony tang but also causes the bright green leaves to turn khaki-brown the moment they hit heat. Adding a handful of spinach is a classic culinary trick to replace the lost chlorophyll and keep the final sauce vibrantly green.
- White pepper is preferred here to maintain the pristine color of the sauce without adding black specks.
- The fat content in heavy cream is crucial not just for mouthfeel, but as a buffer. The fat coats the dairy proteins, preventing the powerful acid in the sorrel from rapidly coagulating them.
- If your sorrel is mature and exceptionally tart, you may need to add a small pinch of sugar during the seasoning phase to balance the astringency.
Storage
Refrigerator: 3 days — Store in an airtight container. Press plastic wrap directly to the surface to prevent a skin from forming.
Reheating: Reheat very gently over low heat, stirring constantly to prevent curdling.
Troubleshooting
Sauce splits or curdles
Cause: The high acidity of the sorrel curdled the dairy, or the cream was boiled too vigorously.
Fix: Remove from heat immediately and vigorously whisk in a splash of cold heavy cream or water. Blending can also re-emulsify it slightly.
Prevention: Ensure you are using heavy cream with at least 36 percent fat, as lower fat dairy curdles easily. Keep heat gentle once cream is added.
Sauce has an unpleasant metallic taste
Cause: The acidic sorrel reacted with reactive cookware like aluminum, cast iron, or unlined copper.
Fix: Cannot be fixed
Prevention: Only use non-reactive cookware such as stainless steel or enameled cast iron when cooking highly acidic ingredients.
Cultural Context
Sauce a l'oseille is deeply rooted in French gastronomy. It achieved legendary status in 1962 when the Troisgros brothers created their iconic 'Saumon a l'Oseille' (Salmon with Sorrel Sauce), which became a foundational dish of Nouvelle Cuisine. They cleverly used the sharp, acidic bite of sorrel to cut through the rich, fatty texture of undercooked salmon.
