Cut the avocados in half lengthwise, remove the pits, and scoop the flesh into a mixing bowl.

Using a fork or potato masher, mash the avocado to your desired consistency.

Add the chopped red onion, minced jalapeño pepper, chopped cilantro, and lime juice to the bowl.

Season with salt and black pepper to taste, and mix everything together until well combined.

Taste and adjust the seasoning if necessary.

Serve the guacamole immediately, or cover and refrigerate until ready to serve.