Chop onion and mix with lime juice allowing it to sit for at least 5 minutes. This step is optional, but helps reduce the sharp bite of the onion.
Combine all ingredients into a large bowl (except avocado), mix well.
The avocado goes last! Scoop the avocado and add to the bowl of mixed ingredients. Use a potato masher or spoon to combine and reach desired consistency.
Serve immediately or store for up to 3 days in the fridge.
Video
Notes
For a less spicy guacamole, omit the cayenne pepper and use less jalapeno pepper