Guacamole
Guacamole, (informally shortened to guac in the United States since the 1980s), is an avocado-based dip or spread first developed in Mexico.
Ingredients
The base recipe uses only Avocados, salt, lime juice, onion, cilantro and some add jalapeños.
Some non-traditional recipes may also call for sour cream, yogurt, tomatoes, basil, or peas.
Vegness
The vast majority of guacamole recipes are vegan. Even store-bought guacamole is "typically" vegan. However, there are certain brands of guacamole that do add milk or egg products.
In 2015, the term Guacamole had "yogurt" as an ingredient in it's description (source needed).
If you're dining out (at a non-vegan place), always ask the Question: What are the ingredients?.