• n squishy ripe avocados (the large ones – Haas?)
• chopped onion (about 1/4 per avocado)
• finely chopped cilantro leaves (about 1 tbsp per avocado)
• fresh lime or lemon juice (about 1/2 tbsp per avocado)
• coarse salt (about 1/4 teaspoon per avocado)
• ripe tomato, chopped, with seeds & pulp removed (about 1/2 small tomato per avocado)
• garlic (about 1 clove per avocado?)

(modified from original source: http://www.elise.com/recipes/archives/000159perfect_guacamole.php )

things i left out:

• 1-2 serrano chiles, stems and seeds removed, minced
• A dash of freshly grated black pepper