[steaknsteak]

In regards to your edit, avocados and chili peppers both originate in Mexico. Guacamole was a native dish so it's been around for centuries, but the modern version with onions and cilantro couldn't have existed until the Spanish brought those ingredients to Mexico

[axaxs]

Excellent points, but at what time would all of that been written in English and American measurements for American consumers, with ingredients available? I only guessed 1960s, but it very well could have been decades later.

[horns4lyfe]

Who makes guacamole with an exact recipe? You don’t need precise measurements for a recipe like that, and if you do you’re doing it wrong.