How many avocados to make 1 gallon of guacamole?

To make 1 gallon of guacamole, you'll typically need about 20 to 30 avocados, depending on their size and ripeness. A medium avocado generally yields around 1 to 1.5 cups of mashed avocado. Considering that 1 gallon equals 16 cups, you'll need a sufficient quantity to reach that volume while also accounting for other ingredients like lime juice, salt, and spices.