I'm actually very fond of mayonnaise, but I won't buy it. Here's my "recipe". Get a widemouth canning jar (Mason, Ball, etc.) and an immersible (stick, wand, etc.) blender.
- Pour in one cup of your chosen oil or oils. If you want to use a solid oil like coconut, melt it gently--but don't use it hot. Don't use more than 1/3 solid oil, or your refrigerated mayo will be too thick.
- Add 1-2 fresh, cold* eggs or egg yolks or a mix of the two. (*warm eggs will not emulsify)
- Add some mustard--prepaired or dry, 2-3 tsp. or more (needed for optimal emulsification.)
- Add a tsp or more of lemon juice or other acid--vinegar, lime juice, etc. (Also needed.)
- Add herbs & other seasonings of choice & salt if desired. I like sriracha sauce. Pureèd ginger or garlic is also nice.
If you accidentally add warm eggs from the counter, put the jar with the oil, eggs (& anything else you've added) into the fridge to chill thoroughly, then blend. Bonus: the mayo will be thicker than usual once refrigerated.
I pour in the oil first, then add the eggs and allow them to settle to the bottom. Then I add the remaining ingredients.
Put the stick blender all the way to the bottom and then start blending. As you blend, pull it up slowly. You'll see the emulsion forming as you do this. Don't be afraid to blend again if you miss pockets of oil or want to add more seasonings. It won't damage the emulsion.
Optional: Add a tsp. or so of active whey (the clear liquid that separates out from yogurt, etc--must be active culture) or of active kombucha or similar) to your ingredients. Allow the finished mayo to sit in a cool shady place for around eight hours before refrigerating. This cultures the mayonnaise so it will keep longer. I don't know how long it will keep. It lasts fine for me until I use it all up (sometimes 2-3 weeks), and I've never had it go bad or make me sick.
If you like, you can double this recipe. Don't go above double though, or the jar will not hold it all with the blender in.