Thomas Keller’s Guide to Making Homemade Mayo and Aioli

Homemade mayonnaise sounds simple until you do it once and get that split, grainy bowl that tastes like defeat. The fix is rarely one thing. It is usually timing, oil control, temperature, and how you build an emulsion that stays stable when you taste it on day one and again when it sits in the fridge.

When people talk about Thomas Keller’s approach to mayo and aioli, they are often pointing to the same practical principles chefs use when they want restaurant texture at home: start with clean, fresh ingredients; keep the emulsion consistent; stream the oil rather than dumping it; and season with intention instead of hoping the jar will forgive you. You do not need the exact equipment from a professional kitchen, but you do need the same discipline about process.

Below is a worked guide to classic mayonnaise and a garlic-forward aioli, built around those principles, with the judgment calls that actually determine whether your sauce turns glossy or breaks.

What mayo really is, and why it sometimes fails

Mayonnaise is an emulsion: dispersed fat droplets suspended in an acidic or aqueous phase. In practice, you are asking egg yolk to do two jobs at once. The lecithin in yolk helps fat and water coexist, and the yolk’s proteins thicken the mixture so it holds together when you stop whisking.

Most breakdowns happen when the fat-to-water ratio shifts too quickly. If you pour oil in faster than the yolk can emulsify it, the droplets collide and coalesce. That is when mayo turns oily, thin, or grainy.

The other common failure is temperature. Mayo is not fragile like soufflé, but it is sensitive. If your yolks are very cold and the oil is much warmer, the emulsion can struggle. If you are using an especially assertive olive oil, the flavor can dominate before you have a chance to balance acidity and salt. The solution is control: bring ingredients closer to the same temperature, add oil gradually at the beginning, and taste as you build.

Ingredients that make the emulsion easier

Start with ingredients that behave well. You can make mayo with a variety of oils, but each choice changes both texture and flavor.

Eggs and yolks: Use fresh eggs. If you are concerned about raw egg safety, use pasteurized eggs or pasteurized yolks. Professional kitchens often handle this matter with standard food safety procedures, and you should do the same according to your comfort and local guidance.

Acid: Traditional mayonnaise uses lemon juice, vinegar, or both. For a bright result, lemon juice is hard to beat. For a more rounded tang, use a gentle vinegar like white wine vinegar. Keep the acid measured. Too much acid can push the emulsion toward a thinner texture, and too little can leave mayo tasting flat.

Mustard: A small amount of Dijon helps stability and adds flavor. It also gives you a subtle “restaurant” note that feels integrated rather than tangy.

Salt: Salt is not just seasoning. It interacts with proteins and can slightly change perceived thickness. Add it early enough that the mayo tastes complete, but not so much that you cannot adjust later.

Oil: Neutral oil gives classic American-style richness. Olive oil gives a more fragrant, slightly peppery sauce, especially in aioli. If you use all olive oil for mayo, you may get a sharper flavor than expected. Many kitchens blend neutral oil with olive oil to get the best of both worlds, but you can tailor it to your taste.

The Keller-style mindset: build control early

In a good mayo, the first minute matters more than the last. The yolk is what makes the emulsion. Once you have a stable base, the rest becomes predictable: keep the oil stream steady, whisk until glossy, then adjust seasoning.

If you have ever watched a chef make mayo, you might notice they do not rush the oil at the beginning. That slow start is not drama, it is chemistry.

Classic homemade mayonnaise (by hand whisk)

This method gives you maximum control over texture. It also teaches you what “stable emulsion” looks like, so you can troubleshoot quickly later.

Method

In a bowl, whisk egg yolks with Dijon, lemon juice (or vinegar), and salt until the mixture looks slightly lighter and cohesive.
While whisking constantly, add oil at first in a very thin stream, then gradually increase the stream as the mixture thickens.
Continue whisking until the mayo is thick, glossy, and holds soft peaks when you lift the whisk.
Taste and adjust with more lemon juice, a pinch more salt, or a touch more mustard if you want it more assertive.
Refrigerate immediately. Mayo tightens in the cold and flavors meld over a few hours.

That is the whole skeleton. The practical details are where the results live.

How thin is “thin stream,” and how do you know it’s working?

For the first few tablespoons of oil, go slower than your instinct. Think about the oil falling in a narrow ribbon, not falling like a drizzle from a tilted bottle. If you whisk fast, you can maintain the emulsion with a slightly quicker pour, but if you are unsure, slow down.

You will feel it. Early on, the mixture will be looser and emulsification will look subtle. Then it suddenly thickens and looks smoother. At that point, you can add oil a bit faster. If it never thickens and instead becomes oily, it is already breaking. Stop adding oil, start over with a fresh yolk base, or use a rescue technique described below.

Troubleshooting: when mayo breaks, and how to save it

The most useful thing about making mayo at home is that you learn to recover. Chefs do this constantly on a busy line.

If your mayo starts to separate, you have options:

Add a teaspoon of warm water to the broken mixture while whisking vigorously.
Start a fresh yolk in a clean bowl, whisk it, then slowly whisk the broken mayo into it.
Begin again with a slightly cooler, steadier oil addition, if the oil was added too quickly.
Taste for balance after it comes together, because rescue can slightly dilute flavor intensity.
If it is grainy, strain it. A fine sieve can smooth the texture without sacrificing flavor.

The water method is quick, but it can produce a slightly looser mayo than a true rebuild. The yolk rebuild is more reliable. Straining is the last step, not a substitute for rescuing the emulsion.

Making aioli: same foundation, different rules

Aioli is where people get stuck because the word gets used loosely. Some jars marketed as aioli are mayonnaise with garlic flavoring, thickened and stabilized with additives. True aioli, at least in the traditional culinary sense, uses an emulsion plus garlic that is integrated in a way that tastes clean and fragrant rather than harsh.

Keller-style aioli thinking is usually about two things: the garlic must be present but not bitter, and the texture must be consistent like mayo. The emulsion method matters as much as the flavoring.

Garlic matters more than you think

Garlic can turn sharp or bitter if you overdo it, and it can also overwhelm the oil so everything tastes like garlic first, everything else second.

You can control garlic intensity in two ways:

Use the right kind of garlic (fresh, firm cloves).
Prepare it so it emulsifies well instead of floating in gritty bits.

For the cleanest results, mince garlic very finely and then work it into the initial yolk mixture. Another approach is to make a garlic paste with a pinch of salt, then fold that into the base.

If you add garlic later, after the emulsion is already built, the mayo can sometimes seize slightly or become uneven, depending on the garlic texture. So integrate early.

Homemade aioli (garlic-forward, restaurant-style texture)

This is the method I recommend when you want aioli that you can serve with fries, use in a sandwich, or dollop beside seafood without it tasting like garlic dressing.

You can make it with either all olive oil or a blend, but with pure olive oil the flavor will be more assertive. If you want something classic and elegant, start with a blend.

Practical approach

Whisk egg yolks with Dijon and acid the same way you would for mayo. Once the base is cohesive, add the garlic paste. Then begin your oil addition slowly at first, and speed up as the aioli thickens.

As you whisk, pay attention to aroma. Good aioli smells like garlic and olive oil, not like raw garlic. If the garlic smells raw and aggressive, it means the garlic is too coarse or insufficiently integrated. Next time, mince finer or mash with salt.

Balancing aioli

Aioli should taste bold, not sour. If you go too heavy on lemon juice early, the garlic can feel sharper. If you under-season, aioli can taste flat and heavy. Taste constantly. Add salt in small increments and adjust acidity at the end.

A helpful rule: once your aioli is thick and glossy, you can adjust acidity in teaspoons. It is hard to “un-acid” aioli, but you can always add a touch of salt or a few drops more lemon to bring it into focus.

Oil choices: neutral versus olive, and why blends win

If you want two sauces that behave consistently, treat oil choice like part of the recipe, not an afterthought.

Neutral oil (like a mild sunflower or grapeseed) produces a silky, mild mayo that lets acid and mustard lead. It also makes it easier to keep flavors balanced when you add other ingredients.
Olive oil adds aroma and body, but it can be bitter or peppery depending on the variety and how fresh it is. Even good olive oil can taste aggressively green if it is very young and pungent.

Blends often give the best of both worlds. You get olive character without the risk of overwhelming garlic or mustard. If you are making aioli, and you know your olive oil is intense, blending can keep the sauce refined.

Texture checks you can do without fancy tools

Mayo texture is visual and tactile. You do not need a thermometer.

Lift the whisk and watch how the ribbon falls. It should fall slowly, not run like a thin vinaigrette.
Spoon a small amount and look for a smooth surface with a sheen. Graininess often signals too-fast oil addition or uneven emulsification.
If the sauce feels tight and thick in the bowl, it will likely be even better in the fridge after it sets.

Once chilled, mayo should hold its shape. Aioli should be slightly thicker than the average prepared mayo, but still spreadable.

Common edge cases at home

Olive oil that tastes too strong

If your aioli tastes peppery or bitter, it may be the oil rather than your technique. Try the same method with half the olive oil replaced by a neutral oil. You will still get olive aroma, just not the harsh finish.

Garlic that turns bitter

Bitter garlic often comes from coarse garlic pieces or garlic that was warmed too much. If you are using a garlic paste made with a mortar and pestle, keep it fresh and do not toast it. For the future, aim for fine integration and adjust acidity at the end.

Over-thick mayo

Sometimes you will keep whisking and end up with a mayo that feels stiff. You can loosen it by whisking in a teaspoon of lemon juice or warm water. Do this gradually. Mayo that is too thick can be delicious, but it will not behave well as a sandwich spread.

Storage and serving: what changes after the bowl cools

Once mayo is refrigerated, it firms. That is not just perception. Emulsions behave differently when cold. Flavors also settle. Lemon and vinegar taste slightly less sharp after a few hours, and mustard becomes more integrated.

Use clean utensils. Mayo is easy to contaminate because it is rich and has a lot of surface area in a shared container. If you are serving aioli at a table, keep it portioned in small bowls and avoid dipping the same spoon repeatedly.

Homemade mayo usually keeps for a limited time, typically a few days when refrigerated, but your exact timeline depends on ingredients and food safety practices, especially if eggs are not pasteurized. When in doubt, err on the conservative side.

Variations worth trying, without losing the base

You can personalize mayo and aioli once you master stability. The trick is adding flavor ingredients in a way that does not break the emulsion.

For example, you can stir in:

A spoonful of chopped herbs after the mayo is finished, keeping pieces small.
Roasted garlic instead of raw for a sweeter, deeper garlic profile.
A touch of smoked salt for a more savory, bacon-like note.

The key is to add these after the emulsion is established and ensure they are not too watery. Watery add-ins can thin the emulsion if you add too much.

A quick “make it right” workflow in real kitchens

In restaurants, mayo and aioli get made because they work with the rest of the menu, not because they are trendy. That means the sauce has to be consistent every day.

A practical workflow is to think in phases: stabilize first, then season, then Thomas Keller cookbook cool.

If you do seasoning while the sauce is warm, you may overshoot. Mayo thickens as it chills, and the balance of lemon and salt can feel different once the emulsion tightens. Taste early enough to guide you, then taste again after refrigeration. That two-taste habit is why chefs rarely have “mystery” flavor issues.

Bringing it together: mayo to aioli and back again

The reason these two sauces belong together is that they share the same backbone. Once you can make a stable mayo, aioli becomes a flavor assignment: garlic integrated into an emulsion, plus a careful hand with acidity.

If you want your first attempt to feel confident, do this: make a small batch of mayo, get the texture right, then convert it into aioli by whisking in garlic paste and adjusting seasoning. That way you learn what “right” feels like before you ask for a more intense flavor.

Homemade mayo is one of those skills that pays you back in small ways, again and again. A sandwich gets better, fries stop needing ketchup, and seafood tastes cleaner. Most of all, you stop fearing the bowl. Once you understand how slow oil addition and seasoning timing work together, the sauce stops being luck and starts being craftsmanship.