Emulsifying is the technique of forcing two liquids that normally repel each other—like oil and vinegar—into a stable, creamy mixture. This article delivers three foolproof emulsions: a classic vinaigrette, a rich hollandaise, and a silky mayonnaise. Each recipe relies on the same core principle: slow addition of oil to a water-based phase while whisking constantly, so the sauce holds together without splitting.
Ingredients
- For the Vinaigrette:
- 1 tbsp (15 ml) Dijon mustard
- 2 tbsp (30 ml) red wine vinegar
- 1/2 cup (120 ml) extra-virgin olive oil
- 1/4 tsp salt
- 1/8 tsp black pepper
- For the Hollandaise:
- 3 large egg yolks (pasteurized if you prefer)
- 1 tbsp (15 ml) lemon juice
- 1/2 cup (113 g) unsalted butter, melted and warm
- 1/8 tsp cayenne pepper
- 1/8 tsp salt
- For the Mayonnaise:
- 1 large egg yolk (pasteurized if you prefer)
- 1 tsp (5 ml) Dijon mustard
- 1 tbsp (15 ml) lemon juice
- 1 cup (240 ml) neutral oil (like canola or grapeseed)
- 1/4 tsp salt
Instructions
- Make the vinaigrette: In a small bowl, whisk the mustard, vinegar, salt, and pepper until combined. While whisking constantly, add the olive oil in a thin, steady stream. Continue whisking until the dressing is thick and opaque. Set aside.
- Make the hollandaise: Fill a saucepan with 1 inch (2.5 cm) of water and bring to a simmer over medium heat. In a heatproof bowl that fits over the saucepan without touching the water, whisk the egg yolks and lemon juice together. Place the bowl over the simmering water and whisk constantly until the yolks thicken and turn pale, about 2 minutes. Remove the bowl from the heat. Slowly drizzle in the warm melted butter, whisking continuously, until the sauce is thick and glossy. Stir in cayenne and salt. If the sauce gets too thick, whisk in 1 tsp (5 ml) of warm water.
- Make the mayonnaise: In a medium bowl, whisk the egg yolk, mustard, lemon juice, and salt until well combined. While whisking constantly, add the oil drop by drop at first, then in a thin stream once the mixture starts to thicken. Continue whisking until all the oil is incorporated and the mayonnaise is thick and creamy. If it becomes too thick, whisk in 1 tsp (5 ml) of warm water.
- Store or serve: Use the vinaigrette immediately or refrigerate for up to 1 week. Serve the hollandaise right away, or keep it warm in a thermos for up to 1 hour. Refrigerate the mayonnaise for up to 1 week.
Tips
- Temperature matters: For hollandaise, the butter should be warm but not hot; if it’s too hot, it will cook the yolks and scramble them. For mayonnaise, all ingredients should be at room temperature to help the emulsion form faster.
- Rescue a broken sauce: If your emulsion splits, place a new egg yolk (or 1 tsp of mustard for vinaigrette) in a clean bowl and slowly whisk the broken sauce into it, drop by drop, to bring it back together.
- Substitutions: For a dairy-free hollandaise, use clarified butter or a vegan butter substitute; the flavor will be slightly different. For a lighter mayonnaise, use half olive oil and half neutral oil, but note that olive oil can make it bitter.
- Common mistake: Adding oil too quickly is the #1 reason emulsions fail. Patience is key—always pour in a thin, steady stream while whisking.
Serving Suggestions
Drizzle the vinaigrette over a crisp green salad or roasted vegetables. Serve the hollandaise over poached eggs, steamed asparagus, or grilled salmon. Use the mayonnaise as a base for aioli (add minced garlic and herbs), spread it on sandwiches, or mix it into tuna or chicken salad.
Variations
- Herb Vinaigrette: Add 1 tbsp (15 ml) chopped fresh herbs (like parsley, chives, or tarragon) to the vinaigrette after emulsifying.
- Béarnaise Sauce: Replace the lemon juice in hollandaise with 1 tbsp (15 ml) white wine vinegar and 1 tsp (5 ml) minced shallot, and add 1 tbsp (15 ml) chopped fresh tarragon at the end.
- Garlic Mayonnaise (Aioli): Add 1 clove of minced garlic to the mayonnaise before adding the oil.
- Spicy Mayonnaise: Stir in 1 tbsp (15 ml) Sriracha or hot sauce to the finished mayonnaise.
Storage and Reheating
Vinaigrette: Refrigerate in a sealed jar for up to 1 week. Shake well before using; it will separate as it sits.
Hollandaise: Best served fresh, but you can keep it warm in a thermos for up to 1 hour. To reheat, place it in a heatproof bowl over warm (not boiling) water and whisk gently. Do not microwave, as it will likely split.
Mayonnaise: Refrigerate in a sealed container for up to 1 week. Do not freeze, as the emulsion will break. If it separates, whisk in 1 tsp (5 ml) warm water to bring it back.
Frequently Asked Questions
Why did my hollandaise split? The most common causes are adding butter too quickly, overheating the yolks, or using butter that is too hot. To fix it, whisk a new egg yolk in a clean bowl and slowly whisk the broken sauce into it.
Can I use a blender instead of whisking by hand? Yes, a blender or food processor works well for mayonnaise and vinaigrette. For hollandaise, you can use a blender, but be careful not to overheat the yolks; blend on low and add the butter slowly.
Is it safe to eat raw egg in mayonnaise? The USDA recommends using pasteurized eggs for raw preparations, especially for pregnant people, young children, older adults, and anyone with a weakened immune system. Pasteurized eggs are heated to a temperature that kills bacteria without cooking the egg.
Can I make these sauces ahead of time? Vinaigrette and mayonnaise can be made up to a week ahead. Hollandaise is best made fresh, but you can hold it warm for up to 1 hour in a thermos.
Why is my mayonnaise thin? This usually happens if the oil was added too quickly at the start. The emulsion didn’t have time to form. To thicken it, slowly whisk in a little more oil, or start over with a fresh yolk and whisk the thin mixture into it.
Can I use olive oil for mayonnaise? Yes, but extra-virgin olive oil can be bitter. Use a mild olive oil or a blend with neutral oil for a better flavor.
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