Macarrón de Leche de San Marcos

Aguascalientes, Barrio de San Marcos in the capital, is where this macarrón de leche lives. During the Feria Nacional de San Marcos, the sweet sits on butcher paper in dulcerías and market stalls, pale beige bars cut clean, not shiny like cajeta and not chewy like commercial fudge. Ask at Mercado Terán and the older vendors will tell you the same thing: milk, sugar, cazo, wooden spoon, patience.

The ingredient that defines it is leche entera, whole cow's milk from the dairy country around Aguascalientes. Not condensed milk. Not leche evaporada. The texture comes from reducing the milk slowly, then beating the candy at the right temperature so the sugar crystals form small and even. That fine sandy crumb is the point. If it comes out sticky, you stopped early. If it comes out hard as a tile, you bullied the sugar.

I learned this version from a dulcera who sold near San Marcos and corrected my spoon work before she corrected my recipe. She told me the hand must keep the bottom clean, because scorched milk announces laziness from across the room. My mother wrote something similar in her notebook after a trip through the Bajío: do not brown it like cajeta. She was right. Cada estado, su propia cocina.