Cut the avocados in half. Remove the seeds and scoop the interior out of the skin. Place the avocado halves in the bowl of the food processor.
Add 1/2 the olive oil, garlic, herbs, salt, and pepper.
Cover with the top and blend for about 30 seconds, slowly drizzling in the remaining olive oil through the feed tube. Scrape the sides of the processor bowl and put the cover back on. Turn the processor on and add the milk, a tablespoon at a time, through the feed tube while the processor is running.
If you like a thinner dressing, add a bit more almond milk while the processor is running.
Taste the dressing and add more salt and pepper if needed.