Equipment
Ingredients
Fats
- 50 g unsalted butter, cubed
- 50 ml extra virgin olive oil
Aromatics and Acids
- 30 ml sherry vinegar
- 15 g shallot, finely minced
- 5 g dijon mustard
- 2 g kosher salt
- 1 g black pepper, freshly ground
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 84 kcal
- Protein
- 0 g
- Carbohydrates
- 1 g
- Fat
- 9 g
- Fiber
- 0 g
- Sugar
- 0 g
- Sodium
- 85 mg
- Saturated Fat
- 3 g
- Monounsaturated Fat
- 5 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 11 mg
- Potassium
- 8 mg
- Calcium
- 3 mg
- Iron
- 0.4 mg
- Magnesium
- 1 mg
- Phosphorus
- 3 mg
- Zinc
- 0.0 mg
- Vitamin A
- 34 mcg
- Vitamin C
- 0 mg
- Vitamin E
- 0.8 mg
- Vitamin K
- 4 mcg
- Vitamin B6
- 0.0 mg
- Vitamin B12
- 0.0 mcg
- Niacin
- 0.0 mg
- Folate
- 1 mcg
- Water
- 2 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Combine the sherry vinegar, finely minced shallot, Dijon mustard, kosher salt, and black pepper in a medium heatproof bowl. Whisk briefly and let the mixture rest to macerate the shallots, mellowing their raw bite.
Place the unsalted butter in a small, light-colored saucepan over medium heat. Swirl the pan gently as the butter melts. Continue to cook until the water evaporates (bubbling at around 100C/212F) and the milk solids begin to toast to a deep golden brown, reaching about 120C/250F. The butter will yield a rich, nutty aroma.
Immediately remove the saucepan from the heat to stop the browning process. Slowly pour the hot browned butter into the bowl with the vinegar mixture while whisking constantly. Continue whisking vigorously while slowly streaming in the extra virgin olive oil until the vinaigrette is fully combined and emulsified into a smooth, glossy sauce.
Chef's Notes
- Using a light-colored or stainless steel saucepan is crucial for making beurre noisette (browned butter), as dark non-stick pans mask the color change of the milk solids, making it easy to burn.
- Sherry vinegar provides a complex, slightly oxidized acidity that brilliantly bridges the gap between the rich, nutty butter and the grassy, peppery olive oil.
- This vinaigrette is best served warm immediately after making. It works phenomenally well draped over roasted butternut squash, seared scallops, or a hearty kale salad.
- The Dijon mustard acts not only as a flavor enhancer but also as a crucial surfactant, providing the emulsifying power needed to bind the fats and water-based acids together smoothly.
Storage
Refrigerator: 1 week — Butter will solidify when chilled. To reuse, place the sealed container in a warm water bath until liquid, then shake vigorously to re-emulsify.
Freezer: 1 month — Freeze in ice cube trays for individual portions.
Reheating: Gently warm in a hot water bath or microwave on the lowest power setting in 10-second bursts until just melted. Do not boil.
Troubleshooting
Butter turns black and smells bitter or acrid
Cause: Milk solids burned because the pan remained on the heat too long
Fix: Cannot be fixed. Discard and start over with fresh butter.
Prevention: Remove the pan from the heat the moment the solids turn golden brown, as carryover cooking will darken them further
Vinaigrette separates into pools of oil and vinegar
Cause: Fats were added too quickly or whisking was insufficient
Fix: Add a few drops of warm water or an extra gram of Dijon mustard to a clean bowl, then slowly whisk the broken vinaigrette into the new bowl until re-emulsified.
Prevention: Stream fats very slowly while whisking vigorously without pausing
Cultural Context
Beurre noisette, or browned butter, is a cornerstone of classic French culinary technique, prized for its deep, hazelnut-like aroma resulting from the Maillard reaction. By combining this rich, warm element with a traditional vinaigrette structure, the dressing bridges the gap between a heavy pan sauce and a sharp salad dressing. It is heavily associated with autumnal menus, bringing comfort and complexity to the roasted root vegetables and robust greens of the fall harvest.
