Put one beater on the electric hand mixer (or use an immersion blender) and lower it into the container. Blend the ingredients together.
Slowly drip the oil into the mixture while keeping the hand mixer (or immersion blender) on high speed. If you see any pooling of oil on the top, stop adding oil and blend until it is gone.
½ cup avocado oil
Once you start to see the mixture thicken, you can slowly stream in the oil while mixing on high speed until all of the oil is used and the mixture has thickened.