Food Lab's Best Basic Guacamole

I saw this recipe posted on Food Lab: The Best Guacamole (and the Science of Avocados) and knew that I had to try it. I had a bunch of avocados in my kitchen...and they were getting riper by the minute. 
This really is a fantastic guacamole that takes about 15 minutes to make. I made two adjustments: I used about 1/3 cup of cilantro (instead of the recommended 1/2 cup) and replaced serrano chili with jalapeรฑo because that's what I had in my house. My only caveat is this: don't serve this guacamole with super-salty chips. The dip has enough salt in it, and if you use a salty chip, it could be a bit a much. That said, this is now going to be my go-to guacamole recipe. Chunky, creamy and the heat's just right. There aren't many ingredients (6 to be exact) and this is a very affordable homemade party dip. The texture is perfect and the taste is fabulous! Enjoy.
Best Basic Guacamole (Adapted from J. Kenji Lopez-Alt, Serious Eats
Serves 8 as an appetizer
1 small yellow onion, roughly chopped
1 jalapeรฑo chili, roughly chopped (original recipe uses serrano)
1/3 cup picked cilantro leaves, finely chopped, divided (original recipe uses 1/2 cup)
2 teaspoons kosher salt (*go with 1 1/2 teaspoons to start, and add more to taste)
4 ripe avocados
2 tablespoons fresh lime juice
Place onion, chili, half of cilantro leaves, and salt in a mortar and pestle. Pound into a fine paste. Alternatively, combine onion, chili, half of cilantro, salt, and half of lime juice in a food processor or blender and process until smooth paste is formed, scraping down sides as necessary.
Split each avocado in half, discard pits, and spoon out flesh into a medium bowl. Roughly mash with a stiff whisk. Add onion/chili puree, remaining cilantro leaves, and half of lime juice. Fold to combine. Season to taste with more salt and lime juice. Serve immediately with warm tortilla chips.