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Here’s another one of those things that’s ridiculously easy to make at home: Mayonnaise.
How does it work?
To “emulsify” means to mix together two liquids that don’t like to be mixed together. Through the rapid beating and slow addition of the oil, the oil and egg have become emulsified. They’re now beaten together into tiny little bubbles that reflect the light — that’s why the two transparent substances are now white and opaque.
A note on oil.
Mayonnaise is classically made with extra-virgin olive oil. I don’t like the heavy flavor when it’s made this way; I’m used to clean, neutral tastes in mayonnaise. I use part olive oil and part neutral-tasting oil or all neutral-tasting oil. I usually use peanut, on the theory that they don’t have to do too much to the peanut to get oil out of it, as opposed to, say, corn or canola. I’m still searching for the most naturally made oil for this application.
I have tried a half peanut-oil, half virgin-coconut-oil mayonnaise. It’s very coconutty. If you want a tropical effect from your mayonnaise, it works great. If you want a neutral spread, coconut is not the way to go.
A note on egg.
Harold McGee has a system for “safe” mayonnaise that involves using the microwave to sort of pasteurize the egg. You might be able to find it with an Internet search. It’s also included in Mark Bittman’s wonderful “How To Cook Everything,” from which I got the basis of this mayonnaise recipe. But for myself, I’m not concerned about egg safety. We get all our eggs from free-range, healthy hens. Those horrible diseases occur in animals that are treatly horribly.
A note on acid.
Bittman says lemon is the perfect liquid for mayonnaise. I disagree. The mayonnaise I made following his recipe exactly (2 tablespoons lemon, 1 cup olive oil) tasted exactly like cod liver oil. It really was uncanny. I’ve been trying to use it up in tuna salad and fish cookery, because it turns everything milder into a strange fishy thing.
1 to 2 tablespoons vinegar or lemon juice (adjust to your taste near the end)
1 cup oil
1/4 teaspoon salt
A few grindings black pepper
Equipment that bears mentioning
Food processor or blender
Whisk, for the adventuresome
In a nutshell
Mix everything except 3/4 cup of the oil. Drizzle in the rest of the oil slowly.
In the pitcher of a blender, mixing bowl or food processor, mix together everything except 3/4 cup of the oil. Process for several seconds.
With the motor running, pour the oil in a thin stream through the opening of the lid (or into the mixer bowl). Continue until you’ve added all the oil. Go slowly enough that this takes about a minute.
Taste and adjust salt, pepper, vinegar and lemon juice until the flavor balance is to your liking. You may like a more assertive mayo. You can get out your favorite commercial mayonnaise and do side-by-side testing until you have the seasoning tweaked just as you like it. Then write it down so you remake it just the way you like it ever after.
Put it in a canning jar, or a used mayonnaise jar. I’ve kept mine in the refrigerator for over a month. I can’t say how long it takes before it goes bad.