Mole (from the Nahuatl molli — sauce) predates the Spanish conquest, though the current mole negro incorporates post-conquest ingredients (chocolate, sesame, almonds, bread, spices from Europe and Asia). The story of mole being invented by a nun at the Convent of Santa Catalina in Puebla is legendary rather than historical — the preparation is older than the convent and more complex than a single invention. Oaxaca's seven moles (negro, rojo, coloradito, amarillo, verde, chichilo, and manchamanteles) constitute the most complete expression of Mexico's chilli-based sauce tradition.
Mole negro — the most complex preparation in Mexican cooking, and one of the most complex single preparations in any culinary tradition — combines toasted dried chillies (ancho, mulato, chipotle, chilhuacle negro), charred tortilla and charred bread (for body), toasted seeds and nuts (pepita, sesame, almond, peanut), toasted spices (cumin, cloves, cinnamon, black pepper, allspice, thyme), roasted tomato and tomatillo, charred onion and garlic, and chocolate (Mexican table chocolate) into a sauce that requires 2–3 days of preparation and contains 20–30 ingredients. Nothing about this preparation can be rushed or reduced.
**The charring technique:** - Dried chillies: toasted on a comal as per MX-01, but here taken slightly further — until the skin blisters in places. The char adds a specific bitterness that balances the sauce's sweetness. - Tortilla and bread: charred directly on the comal flame until completely blackened — the carbon from the charred starch provides the characteristic near-black colour of mole negro and a specific bitter-complex note. - Onion and garlic: charred on the comal until black on all sides — the Maillard compounds and char together provide depth. - Tomato and tomatillo: roasted or charred. **The toasting sequence:** - Each ingredient toasted separately — different ingredients require different times and temperatures. Combined at the end. **The sauce construction:** - Each charred/toasted ingredient is blended separately or in logical groups (dried chillies together; seeds and nuts together) — then combined into a single blender, adding stock to facilitate blending. - The blended sauce is strained through a sieve — large fibres removed, but the sauce retains its thick consistency. **The frying:** - The strained sauce is added to hot lard or oil in a large pot — a technique specific to Mexican cooking. The sauce "fries" in the hot fat for 10–15 minutes, developing Maillard compounds at the sauce's surface in contact with the oil. **The long simmer:** - The fried sauce is thinned with chicken or turkey stock and simmered 45–60 minutes minimum. The flavour deepens and unifies. **Mexican chocolate:** - Added at the end — sweetened, with cinnamon. Its fat and sugar round the sauce's edges without making it sweet. **The final consistency:** - Mole negro coats the back of a spoon heavily and leaves a clean path when a finger is drawn through the coating. Decisive moment: The frying stage — the moment the strained sauce hits the hot lard in the pot. The aggressive sizzle indicates the correct frying temperature; the sauce should bubble vigorously for the first 2–3 minutes. This frying stage is the flavour development step that transforms mole from a complex liquid to a complex sauce. Sensory tests: **Colour:** After the frying and initial simmer, the sauce should be an extraordinarily deep, opaque brown-black — the colour of dark rye bread or strong espresso. **Consistency:** Thick enough to coat a wooden spoon in a visible layer. When a spoon is held sideways, the mole should move very slowly toward the bowl's rim. **Flavour:** Everything simultaneously — bitter (char), sweet (chilli fruit, chocolate), spicy (the chilli heat), earthy (seeds and nuts), warm-spiced, slightly acidic (from the tomato/tomatillo). No single component identifiable.
Mexico: The Cookbook