How do I get homemade mayonnaise to taste like store bought mayonnaise? I recently made a batch of homemade mayonnaise, having found myself with left over egg yolk from another recipe. I decided not to flavor the mayonnaise with any mustard. The mayo ended up tasting like mostly oil. I decided not to use mustard since the store brands never taste like mustard. How can I adjust the flavor so that my mayo tastes like the typical mayo you get in stores (particularly Hellmann's brand)?

For the record, here is how I prepared the mayo:

For every 1 egg yolk I have, I added 2 table spoons of white vinegar to activate the emulsifier. Then I slowly dripped in vegetable oil until the mixture started to look a bit like yellow mayonnaise. At that point I started adding and stirring into the mixture large portions of vegetable oil until I got to my desired thickness (I like the thicker mayo). I should note that the color was still a very light yellow, perhaps not enough vinegar.
I have to make both mayonnaise and aioli every day at my job. We sometimes do R&amp;D on off days and we spent quite some time trying to imitate our favorite gourmet mayonnaise. I think that we were successful, here are some tips:


Lemon juice comes closer to that crisp tartness that I taste in even cheaper mayonnaise. Try using the juice from lemons, limes, or both and see where that gets you.
The store bought brands don't taste like mustard, but let me emphasize that mustard is vital to getting you closer to that taste. There is a specific "tang" to store bought mayonnaise that doesn't come from the acid -- you can get very close to this tang with mustard. I use a good quality dijon when I make mayonnaise and the difference is noticeable. Keep adding dijon in small amounts and observe the change in taste. I end up 2 - 3 tablespoons to my batch.
Experiment with fresh garlic and/or garlic and onion powders.
Try adding white pepper instead of black pepper and see where that gets you.
I add a little water at the end. I find that it tones down some of the intensity of the acid and dijon.


Also, you don't have to add your acid in the beginning. In fact, I almost always add mine after the initial "setting" of the emulsification. It is easier to control the thickness and flavor of my mayo; I use my acid for my first thinning and then add oil to adjust from there.