Atocpan

San Pedro Atocpan lies at about 2,500 metres in the volcanic uplands of Milpa Alta, south of the old core of Mexico City. Its Nahuatl name means on fertile soil. The community occupies broken ground between Cuauhtzín volcano and Teuhtli mountain, where springs and small fields supported a rural settlement set apart from the lakeside cities below.

Before the Spanish conquest, cooks here prepared chilmulli, a sauce of ground chiles. The valley belonged to the Nahua world of the southern basin, and maize, beans and local animals sustained its households. During the colonial period cooks added nuts, peanuts, sesame, cinnamon and other spices brought through wider trade. The sauce grew richer while remaining thick. Chiles and nuts reached the town through regional markets, while wood and clay supplied cooking vessels and grinding stones. Corn from local fields continued to anchor daily meals.

Atocpan families specialized in mole almendrado, built on mulato, pasilla and ancho chiles. Recipes passed through households and were guarded as local property. The settlement remained rural while Mexico City expanded below. By 1837 its identity was already tied to highland farming and the distinctive chili sauces that joined Indigenous technique with colonial ingredients.