First decide whether the dressing never thickened or thickened and then separated. A dressing that stays smooth but pourable is a ratio problem; visible free oil after a creamy stage points to a broken emulsion.
Symptom matcher
Which one looks most like yours?
Small visual differences can point to very different causes.
Check the oil-addition rate.
Check the oil-to-liquid ratio.
Check the last aqueous addition.
Check recipe scaling.
Check for a broken emulsion.
Right now
Can it be saved?
Usually.
Limit: A badly over-acidified dressing may need enough added ingredients that its flavor must be rebuilt as well.
Interactive check
Get to the first clue faster
Answer one question at a time. The result comes from the same reviewed diagnosis data below.
Did the dressing fail to thicken while the oil was poured quickly?
Is it smooth but thin with no visible free oil?
Did it become thin immediately after extra lemon juice or water?
Was it creamy first and then turn oily or separated?
Slow the oil stream
The emulsion likely never formed properly.
Likely cause: The oil was added too fast to form a stable emulsionCheck the oil-to-liquid ratio
A smooth thin dressing usually points to proportion rather than a break.
Likely cause: There is too little oil for the amount of aqueous baseReduce aqueous dilution
Extra lemon or water can thin a stable dressing.
Likely cause: Too much lemon juice or added water diluted the dressingRebuild a broken emulsion
A dressing that was thick and then separated has broken.
Likely cause: The dressing initially thickened, then separatedCheck yolk and mustard scaling
If the other ratios are correct, the stabilizing base may be too small.
Likely cause: The emulsifier base is too small for the batchDiagnosis
Check the likely causes
Start at the top, but skip anything that clearly does not match your batch. Evidence labels describe the support for each cause, not a fake probability score.
The oil was added too fast to form a stable emulsion
The mixture stays watery and oily instead of becoming creamy during oil addition.
Review whether the oil went in as a fast pour rather than a thin stream.
Start a fresh small yolk-mustard base and slowly whisk the thin dressing into it, using pasteurized egg if the dressing remains uncooked.
Add oil slowly, especially at the beginning of the emulsion.
There is too little oil for the amount of aqueous base
The dressing is smooth rather than separated, but pours like a vinaigrette.
Compare the oil amount with the recipe's yolk, lemon and other liquid amounts.
Whisk in additional oil gradually only if the flavor balance and recipe allow it.
Measure the oil-to-liquid ratio accurately.
Too much lemon juice or added water diluted the dressing
The dressing is emulsified but became thin immediately after lemon or water was added.
Identify the last aqueous addition and compare with the source method.
Re-emulsify with a small amount of additional oil or a little more base if flavor permits.
Add lemon and water in measured amounts and use water only to thin a dressing that is too thick.
The emulsifier base is too small for the batch
A large oil-and-liquid batch has only a very small amount of yolk or mustard and never becomes creamy.
Compare the scaled ingredient ratios with a tested Caesar formula.
Build a new small pasteurized-yolk and mustard base and whisk the thin dressing into it slowly.
Scale emulsifier ingredients with the rest of the recipe.
The dressing initially thickened, then separated
The dressing was thick at first, then developed an oily layer and watery base.
Check whether free oil is visible after a previously stable stage.
Start a fresh small emulsifier base and add the broken dressing gradually while whisking.
Keep ingredients at compatible temperatures and avoid overwhelming the emulsion.
Don't jump to conclusions
Common misdiagnoses
Kitchen science
What is actually happening?
Classic Caesar dressing is an oil-in-water emulsion. Food Network recipes build it by combining yolk, mustard, lemon and anchovy, then slowly drizzling in oil until the mixture thickens and emulsifies.
Testing plan
What we plan to test
Planned tests are shown transparently and are never presented as completed results.
Caesar oil-addition-rate comparison
A slow oil stream should build a thicker, more stable emulsion than adding the same oil rapidly.
Evidence
Sources & methodology
Technical claims are tied to sources; each source shows how it was checked. Recipe-dependent details are treated as context, not universal rules.
- Caesar SaladFood Network / Wolfgang Puck
Food Network slowly whisks oil into the yolk, lemon, mustard and anchovy mixture to emulsify the dressing.
publisherPassage verified - The Best Caesar SaladFood Network Kitchen
Food Network combines anchovy, egg yolk, mustard and lemon, slowly drizzles in olive oil until emulsified, and uses water only a teaspoon at a time if the finished dressing needs thinning.
publisherPassage verified - What You Need to Know About Egg SafetyU.S. Food and Drug Administration
FDA advises using eggs treated to destroy Salmonella or pasteurized egg products for recipes such as Caesar dressing when eggs remain raw or undercooked.
governmentPrimary source
Think a source does not support the claim shown here? Report it.
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