Halve and pit avocados. Scoop the avocado flesh into a medium sized mixing bowl.
Add the diced onion, diced jalapeño, lime juice, and kosher salt into the mixing bowl with the avocados.
Using a whisk, break up the avocados and mix to combine.
Add additional salt and lime juice to taste. Serve immediately.
Notes
Adjust ingredients to taste. I always recommend starting with less. It is easier to add than it is to subtract.
Wear gloves when handling jalapeños. The capsaicin from the peppers can transfer to your skin when touching it and cause a lasting burning sensation. To be safe, wear kitchen safe gloves!
If using fresh jalapeños, taste them before adding to the guacamole! Some jalapeños can be as mild as a green bell pepper, and some can be so hot you won’t be able to taste anything else!