I grew up in CA and generally am a minimalist- just how we made it growing up and the taquerias made it similarly.
Haas avocados only, either from CA or mexico
- two avocados, very ripe, mashed with a fork, still a bit chunky
- good sized pinch of salt
- soup spoon of pico de gallo or whatever salsa is handy
- minced jalapeño to taste
- sometimes juice of half a lime
Taste and adjust as you go.
No garlic, no raw onions, no cumin, cilantro goes on the taco not in the guac.
Make it nanoseconds before eating