Add all of the ingredients, EXCEPT for one cup of the oil, into a high powered blender.
Gradually bring the speed up to medium-high and blend until everything is combined and in much smaller bits.
Now, while blending on medium-high, slowly drizzle in the rest of the oil.
If your blender has a tamper (stick, plunger, whatever you call it, haha), use it as needed to help the ingredients blend better.
Once all of the oil has been added in, blend the dressing on high speed for about 20 seconds to ensure everything is well combined and emulsified. *If your blender gets hot, turn it off and wait for it to cool down; otherwise, the heat may break the dressing, AKA the oil will separate from the rest of the ingredients.
Store in an airtight container and place in the refrigerator. *If you use avocado oil or olive oil, the Caesar dressing will become extra thick once it cools in the refrigerator. However, it will loosen back up after bringing it out to room temperature after a short time. It will also loosen from the warmth of your hands if you gently massage the dressing into your salad.