For most people the answer is the Cuisinart Smart Stick Variable-Speed (CSB-179): its listing names emulsifying as a job it is built for, it has a variable-speed slide rather than a single button, and — the part that actually decides this — it comes with a 2-cup measuring cup, which is the right width for a one-egg batch. If you want the finest control of the pour, the Braun MultiQuick 7 (MQ7035X) sets speed by how hard you press and ships a beaker with it. If you already own the Breville Control Grip Immersion Blender (BSB510XL), you have the best anti-suction head here and the wrong-shaped jug — use a jam jar instead.
Why a $60 stick blender beats a $400 food processor at this. Mayonnaise is an emulsion: millions of oil droplets suspended in a little water, acid and egg yolk, held apart by the lecithin in the yolk. It forms when oil is broken into the yolk gradually. In a narrow jar, the oil floats in a column on top of the egg and the blender head, sitting on the bottom, can only draw in the thin layer immediately above it — so the gradual addition happens by itself, with no drizzling. In a wide bowl the oil spreads into a shallow pool, the head pulls in far too much at once, and you get flavored oil with scrambled yolk in it. Geometry is doing the work, which is why the jar matters more than the motor.
What we judged these on
- Does a correctly sized vessel come in the box? A one-egg batch is about 10 to 12 fl oz finished. The ideal jar is only slightly wider than the blender’s head and tall enough to hold that without the head breaking the surface. A 2-cup to 3-cup straight-sided container is right; a 42 oz jug is not.
- Can it start genuinely slowly? A full-speed start throws the oil column into the yolk all at once. A variable slide, a pressure-sensitive trigger or a multi-speed dial all solve this; a single on/off button does not.
- Head and guard geometry. A bell-shaped guard that reduces suction stops the blender welding itself to the bottom of a narrow jar — the thing that makes the first attempt feel like wrestling.
- Shaft length against jar depth. An 8-inch shaft in a 6-inch jar is right. A 9-inch shaft is for stockpots and is slightly awkward here.
- Washing raw egg and oil off it. A detachable shaft that goes in the dishwasher matters more on this job than on soup, because raw egg is not something to leave on a tool until later.
Wattage is deliberately not on that list. Mayonnaise asks almost nothing of a motor — there is nothing hard in the jar — so the 300 W pick at the top of this page does the job as well as the 600 W one. Watts matter for frozen fruit and dense soup, and we weigh them properly on the main immersion blender roundup.
The picks
1. Cuisinart Smart Stick Variable-Speed (CSB-179) — the one to buy for this job
Three things put it first, and only one of them is on the spec sheet in the usual sense. Cuisinart’s own listing describes the 8-inch stainless shaft as being for “easy puréeing, emulsifying or whipping” — emulsifying named outright. The control is a variable-speed slide, so you set a low speed before you press anything rather than discovering it at full power. And it comes with a 2-cup mixing/measuring cup, which is the correct vessel for a one-egg batch without buying anything extra. A 3-cup chopper and a whisk are in the box too, and the warranty is a limited 3-year — the longest here.
Honest cons: 300 W is the lowest published motor in this group, so for thick soup or anything frozen it is the weakest of the five; and the supplied cup is plastic, which stains if you make a lot of turmeric-heavy aioli. Our full Cuisinart Smart Stick review covers how it behaves on the rest of the job list.
2. Braun MultiQuick 7 (MQ7035X) — the finest control
Braun’s SmartSpeed system has no speed settings at all: the harder you press the button, the more power you get. For an emulsion that is exactly the right interface, because the whole technique is a slow build you can feel. The listing also claims a flexible ACTIVEBlade shaft that moves the blade up and down for more cutting surface, a POWERBell Plus guard with an extra milling blade, and SPLASHcontrol with 25% less suction than Braun’s MQ500 — the suction figure being the one that matters most in a narrow jar. A beaker, a whisk and a 2-cup chopper come with it.
Honest cons: it is the most expensive thing here other than the Breville, and for mayonnaise specifically you are paying for control you could approximate with a cheaper variable slide. The pressure-trigger also takes a batch or two to calibrate in your hand. Full detail in our Braun MultiQuick 7 review.
3. KitchenAid Variable-Speed Corded Hand Blender (KHBV53) — the best jar in the box
The KHBV53 ships a 3-cup BPA-free blending jar with a lid, and a lid is worth more than it sounds: mayonnaise goes into the fridge in the thing you made it in, which removes the one messy transfer in the whole process. Control is a variable-speed trigger, the 8-inch blending arm detaches for washing, the blade is a 4-point stainless design, and KitchenAid includes a patented removable pan guard for cookware.
Honest cons: 3 cups is slightly wider than ideal for a single egg — it works, but a 2-cup container works better, and the fix is free if you own a jam jar. At a published 180 W it is also the lowest-powered pick on the page, which matters not at all for mayonnaise and a good deal for thick winter soup. See our KitchenAid hand blender review.
4. Breville Control Grip Immersion Blender (BSB510XL) — the best head, the wrong jug
The bell-shaped base with internal ribbing is the most thought-through anti-suction design on this page: Breville states it both reduces suction and stops the blender scratching the pan, and in a narrow jar reduced suction is the difference between blending and wrestling. The trigger grip gives a natural hand position and 8 inches of immersion depth, and there is a whisk, a 25 oz chopping bowl and a 42 oz jug with an anti-slip mat in the box.
Honest cons: that 42 oz jug is the wrong vessel for mayonnaise — too wide, so the oil spreads instead of stacking. Use a 2-cup jar instead and the machine is excellent. It is also the most expensive pick here, with the shortest stated warranty (1 year limited), which is a poor combination if mayonnaise is the main reason you are buying. Detail in our Breville Control Grip review.
5. MuellerLiving Ultra-Stick 500W Immersion Blender — the budget route
A published 500 W, a multi-speed dial plus a turbo button, an attachment set that includes a whisk, and a blade housing Mueller says reduces splashes — for roughly a third of what the Braun costs. The low end of the dial is what you need for an emulsion, and it is there, and the attachments are dishwasher safe.
Honest cons: the listing does not name a beaker among the accessories, so plan on supplying your own jar — which, for this job, is a 60-cent problem. The build is plastic-heavy next to the metal-bodied sticks and its longevity is less proven than Braun or KitchenAid. Our Mueller Ultra-Stick review is blunt about where the money was saved.
One more worth naming: the All-Clad immersion blender publishes the highest wattage in our catalog at 600 W, with a variable-speed dial, a turbo button and a 9¼-inch driveshaft. It makes mayonnaise perfectly well. We have left it off the ranking because that long shaft is built for deep stockpots and is the least comfortable of the group in a 2-cup jar, and because no beaker is named with it — it is a soup machine that can do mayonnaise, rather than the other way round.
What each one publishes
| Pick | Speed control | Vessel in the box | Published motor | Stated warranty |
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| Cuisinart Smart Stick Variable-Speed (CSB-179) | Variable-speed slide | 2-cup mixing/measuring cup — the right width | 300 W | Limited 3-year |
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| Braun MultiQuick 7 (MQ7035X) | Speed set by trigger pressure | Beaker, plus a 2-cup chopper | 500 W, stated in the listing’s feature text | Not stated on the listing |
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| KitchenAid Variable-Speed Corded Hand Blender (KHBV53) | Variable-speed trigger | 3-cup jar with a lid | 180 W | Not stated on the listing |
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| Breville Control Grip Immersion Blender (BSB510XL) | Trigger grip, ribbed anti-suction bell | 42 oz jug — too wide for mayonnaise | 280 W | 1-year limited |
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| MuellerLiving Ultra-Stick 500W Immersion Blender | Multi-speed dial plus turbo | No beaker named — supply your own jar | 500 W | Not stated on the listing |
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The method, in the order that matters
Put one whole egg into the jar first, then a tablespoon of lemon juice or vinegar, a teaspoon of mustard if you want it, and salt. Pour one cup of neutral oil on top and leave it for a few seconds: the oil will sit as a distinct layer above the egg, and that layering is the mechanism, not an aesthetic. Push the blender all the way to the bottom so the head is sealed under the egg. Start it on a low speed and hold it still — the bottom inch turns pale and thick within a few seconds. Only then lift the shaft slowly through the oil column, an inch at a time, and the emulsion climbs with you. Thirty seconds, start to finish.
Whole egg rather than yolk only is the version that suits a stick blender, because the white adds the water the emulsion needs. If you are serving anyone pregnant, very young, elderly or immunocompromised, use pasteurized eggs — mayonnaise made this way is not cooked. Refrigerate it and treat it as a few days’ condiment, not a pantry item.
Why it splits, and how to rescue it
There are only three common failures and all three are procedural rather than mechanical. The jar was too wide, so the head pulled in the whole pool of oil at once — the single most common cause, and the reason this page ranks on vessels. You lifted too early or too fast, before the base had thickened. You started at full power, which does the same damage in a quarter of the time.
A split batch is recoverable and nothing needs throwing away. Put a fresh egg yolk in a clean jar, blend it for a second on its own, then pour the broken mixture in slowly in a thin stream with the blender running. It comes back as mayonnaise, and you end up with a slightly larger batch than you planned.
Where this page stops
What an immersion blender is actually for lists two-minute mayonnaise as one of ten jobs these machines do better than anything else; that page answers what the tool is for, and this one answers which to buy for the emulsion specifically. The main roundup ranks the field on everything at once, and the attachments guide explains which accessories earn their storage. If what you actually want is a machine with a lid you can drizzle oil into while it runs, that is a different tool — see the best mini food processors, several of which have an oil hole for exactly this job, and food processor vs immersion blender for the wider comparison. For hot sauces and hollandaise, read how to blend hot liquids safely before you start.
