This avocado-based mash may be the most divisive condiment in existence. "Everyone has [a personal] take on how it should be, what should go in it," says Kamio. Indeed, some people love adding garlic; others say that's sacrilege. Some fold in sour cream; others would rather fold in oil. The only consensus: Guacamole belongs in burritos. So opt to personalize your guac. A hint: Cilantro, onion, jalapeño, and salt are the traditional ingredients. Start there, then get creative.