Add 1 egg, 2 teaspoons of lemon juice, 1/2 teaspoon of mustard, 1/2 teaspoon of salt, and 1 cup of avocado oil to a wide mouth mason jar.
Next, take an immersion blender and beginning at the bottom of the jar blend the egg until it is white and creamy. This will take about 1 minute.
Next move the blender up to incorporate the oil. Continue blending until it is fully mixed, about 1-2 additional minutes.
Video
Notes
What if my mayo is water?
No worries! This has actually happened to me twice over the years of making many batches of mayo.
When it does I use the watery messed up mayo as the oil and try again.
So, I put the egg, lemon juice, and mustard in the bottom of another widemouth jar and then pour the watery mayo over and blend again. It ends up having two eggs, but I don’t add the salt the second time around since it is only for flavor.