Mayo Recipe Needed

If you are using a blender to emulsify the mayo, then I would avoid olive oil as the speed of the blender blades will break up the oil and leave a bitter taste. Use a neutral oil like peanut and then add a bit of olive oil or tallow at the end for flavor.

1 Egg
240 g Oil
15 g garlic
15 g acid (lemon or vinegar)
15 g dijon
Pinch of salt.
Blend egg, garlic, acid, Dijon and add oil slowly until emulsified.
Add tallow or olive oil for flavor.

To branch out you can add other things like horseradish, soy sauce, etc.

There are some very cool videos for making mayo using an immersion blender and a smallish jar.

I use a food processor and I process an egg, a clove of garlic, a teaspoon of Dijon mustard and the juice of half a lemon. Then I slowly drizzle in a cup of neutral oil like canola or avocado. It'll emulsify pretty easily. Then I'll had a pinch of salt and pepper and it's done. I use to use a 1/4 cup of EVOO but it turns out bitter.

If you have an immersion blender, use it. I made some aioli this past weekend using the following recipe. add all ingredients (whole garlic clove too), and hit it with the immersion blender. It's done in 20-30 seconds.

1 egg yolk
1 cup grapeseed oil (or any other neutral oil)
1 garlic clove
1/2 tsp dijon mustard
2 tsp malt vinegar (I used this for the aioli, but you should use lemon for mayo)