Name: Master Mayonnaise (The Cold Mother)
Yield: 350 g (~1.5 cups)
Cuisine: Global
Ingredients: 1 Large Egg Yolk (room temperature); 15 g (1 tbsp) Dijon Mustard; 10 ml (2 tsp) White Wine Vinegar or Lemon Juice; 3 g (1 tsp) Diamond Crystal Kosher Salt; 200 ml (¾ cup plus 2 tbsp) Neutral Oil (Grapeseed or Canola); 50 ml (3 tbsp) Extra Virgin Olive Oil; 5–10 ml (1–2 tsp) Warm Water (if needed)

Classic stable emulsion using yolk lecithin and mechanical shearing.

Yield: 350 g (~1.5 cups) | Prep: 10 min | Cook: 0 min | Total: 10 min

Headnote

This is the “Mother of the Cold Kitchen.” By suspending microscopic droplets of oil within a water-based acid (vinegar/lemon), we create a creamy, shelf-stable fat that carries flavor. We use a blend of neutral oil for structure and olive oil for finish, ensuring the sauce isn’t bitter. Teaching Idea: The Standard Emulsion Ratio. A single large egg yolk can emulsify up to 7 ounces (200g) of oil if added slowly. Exceeding this ratio causes the sauce to “break” (separate).

Ingredients

The Base

1 Large Egg Yolk (room temperature)
15 g (1 tbsp) Dijon Mustard
10 ml (2 tsp) White Wine Vinegar or Lemon Juice
3 g (1 tsp) Diamond Crystal Kosher Salt

The Fat

200 ml (¾ cup plus 2 tbsp) Neutral Oil (Grapeseed or Canola)
50 ml (3 tbsp) Extra Virgin Olive Oil

The Adjuster

5–10 ml (1–2 tsp) Warm Water (if needed)

Mise en Place (Action Checklist)

Tempering: Remove the egg from the fridge 30 minutes prior. Room temperature ingredients emulsify faster than cold ones.
Stabilize: Place a damp towel under your mixing bowl to prevent it from spinning while whisking.
Measure: Pour the oils into a vessel with a spout for easy pouring.

Method

Phase 1: The Yolk Base.

In a medium stainless steel bowl, whisk together the egg yolk, Dijon mustard, vinegar, and salt. Whisk vigorously for 30 seconds until the mixture is creamy, pale yellow, and slightly tacky.

Why: The mustard acts as a co-emulsifier and helps “grip” the first drops of oil.

Phase 2: The Nucleation (Critical Step).

Begin whisking the egg mixture continuously. Add the Neutral Oil drop by drop — do not pause the whisk between drops. Do not rush this stage. Once you have added about 2 tablespoons of oil and the mixture has thickened into a heavy cream consistency, you have established the emulsion nucleus.

Phase 3: The Stream.

You may now increase the oil flow to a thin, steady stream, whisking rhythmically. The sauce should become very thick. Switch to the Extra Virgin Olive Oil for the final addition to layer in the flavor.

Sensory Cue: The whisk should leave distinct trails in the sauce (ribbons) when lifted.

Phase 4: Adjustment.

If the mayonnaise is too stiff (jelly-like), whisk in the warm water one teaspoon at a time to relax the texture. Taste and adjust salt if necessary. Transfer to an airtight container immediately.

Glossary

Emulsion: A mixture of two liquids that would ordinarily not mix (oil and water).
Lecithin: A fatty substance found in egg yolks that bonds with both water and oil, stabilizing the mixture.