The lime juice in this recipe will keep the guacamole from turning brown and brings it a much more interesting flavor than lemon juice. The sour cream turns it to satin.
- Mash the avocado with a potato masher.
- Using a fork, whisk in the remaining ingredients except for the sour cream (or you can do it in the food processor for an even silkier texture.) Let stand at room temperature for 15 minutes.
- Whisk in the sour cream, and you are ready to serve.