For authentic guacamole dip, gather 5 Hass avocados, 1 large tomato, 1 medium white onion, 3/4 cup cilantro and 2 large limes. You also need salt to taste and a small jalapeño, if heat is desired. Mix mashed avocado with other ingredients, and serve with tortilla chips.
When shopping for avocados, select large ones with blackish skins. These are ripe and should be soft when pressed. Slice each avocado in half, remove the large seed, then scoop contents into a mixing bowl with a spoon. Next, add the juice of 1 lime to arrest the browning process. To make juicing easier, roll the lime under your palm several times on a cutting board or counter before cutting it open. Squeeze cut side up to avoid dropping seeds in avocados.
Mash avocado and lime juice together, then add chopped onions, tomatoes and cilantro. Mix everything together, and add the juice of the second lime and the chopped jalapeño, along with salt to taste. While this recipe produces a chunky guacamole dip, some people prefer a creamier consistency. If desired, transfer the mixture to a food processor and pulse together until the texture is ideal. To store overnight, cover guacamole with air-tight wrap above the surface of the dip, pressing the wrap soundly into the sides of the container, and then place the container lid on the top. Guacamole browns unappealingly with the slightest air exposure.