Mexico; chicken soup in Mesoamerica predates the Spanish arrival in some form; the ofrenda (altar) tradition of Día de los Muertos is a pre-Hispanic celebration merged with Catholic All Saints' Day.
Caldo de pollo — Mexican chicken soup — is one of the dishes placed on the ofrenda (altar) during Día de los Muertos (Day of the Dead, November 1–2) to nourish the returning spirits of the deceased. The preparation is among the most fundamental in Mexican cooking: a whole chicken simmered with charred onion and garlic, vegetables, and herbs until the broth is deep and golden and the chicken is falling from the bone. Served with warm corn tortillas, lime, avocado, and fresh salsa, caldo de pollo is simultaneously everyday food and sacred food — which may be the most Mexican of distinctions. The dish's quality depends entirely on the broth: the charring of the onion and garlic directly over the flame gives it the smoky depth that distinguishes it from a simple chicken broth, and the Mexican herbs — epazote and Mexican oregano — give it a character that Italian or French herbs cannot replicate.
Char the onion and garlic directly over a flame or in a dry comal until blackened — this is the foundational flavour step Whole chicken simmered at the lowest possible simmer — a boiling broth makes the meat tough and the broth cloudy Epazote (if available) added for the last 20 minutes — a traditional Mexican herb with an earthy, slightly medicinal quality that is the signature of authentic caldo Skim frequently during the first 20 minutes — the initial simmering releases proteins that cloud the broth; remove them for clarity Vegetables added at different stages: zucchini and chayote in the last 20 minutes; corn on the cob from the beginning Serve with the traditional accompaniment table — lime, avocado, cilantro, white onion, and jalapeño for the diner to add themselves
For the deepest broth: roast the chicken carcass separately at 200°C for 20 minutes before adding to the pot — the Maillard crust on the bones adds depth Chipotle en adobo — one chile — added to the broth gives a smoky, slightly spicy depth that is a popular regional addition Traditionally, the chicken is pulled from the broth, shredded, and returned — this produces a more unified dish than serving the whole pieces in the soup
Boiling instead of simmering — murky, tough; always the lowest possible simmer Skipping the char — a pale, uncharred aromatics produce a flat, generic chicken broth without the Mexican character Forgetting epazote — it's an ingredient with no substitute for this specific preparation No accompaniment table — caldo served plain is incomplete; the table of fresh garnishes is the other half of the dish Over-cooking the vegetables — they should be tender but not mushy; add in stages