Place the ingredients into a pint-sized, wide-mouth mason jar. Insert the immersion blender all the way to the bottom of the jar.
Start blending and leave the blender at the bottom for 10-20 seconds, allowing the mixture to start emulsifying.
Pull the stick blender up and down to incorporate the ingredients.Keep processing until completely blended. Use a spatula to stir the mayo vigorously after blending the help smooth it out.
Store in the fridge for 4-5 days.