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TechniqueFebruary 16, 2026Β· 5 min read
The Magic of Emulsification: Oil and Water United
Mayonnaise, vinaigrette, cream sauce β how oil and water become one.
Oil and Water Don't Naturally Mix
What Is Emulsification?
Breaking oil into tiny droplets suspended in water, held together by emulsifiers β molecules that love both oil and water.
Common Emulsifiers
| Emulsifier | Found In | Used For |
|---|---|---|
| Lecithin (egg yolk) | Eggs | Mayo, hollandaise |
| Mustard | Mustard seeds | Vinaigrette |
| Casein | Milk | Cream sauces |
Why Mayo Doesn't Separate
Egg yolk lecithin wraps each tiny oil droplet, preventing them from merging back together.
Perfect Vinaigrette
- Start with 1 tsp mustard β natural emulsifier
- Add vinegar and mix
- Drizzle oil in very slowly while whisking vigorously
- Faster whisking = smaller droplets = more stable
Why Emulsions Break
- Temperature changes β too hot or cold
- Too much oil at once β add slowly
- Not enough mixing β droplets recombine
Fixing a Broken Emulsion
- Fresh bowl + 1 egg yolk
- Add broken emulsion drop by drop while whisking
- Gradually increase as emulsion reforms
Remember: The key is "slowly, little by little, keep stirring"!