Mercaderes occupies a colonial building steps from the Zócalo with white tablecloths, live musicians, and a house bread so consistently memorable it overshadows everything else on the menu. The duck and chiles rellenos hold their own; the steaks arrive cold or tough often enough to be a pattern. Surprise charges for 'complimentary' items catch careful travelers off guard, and the restaurant reads as a place trading on its past rather than its present kitchen. Breakfast and brunch work better than dinner. Choose it for the historical setting and one or two dishes ordered with intention - not for a special night with high culinary hopes.
Ask before you accept anything the waiter describes as a complimentary extra, because those items tend to show up on the bill. That said, the duck is the real reason to come to this white-tablecloth colonial dining room near the Zócalo, and the bread alone sets a tone that most of Centro Histórico cannot match
What to order
The duck and chiles rellenos are reliable; skip the steaks, frequently reported cold and underseasoned.
Reservations
Call ahead directly, especially Thursday to Saturday. No online booking confirmed.
Price range
Mid-to-high. Watch for undisclosed charges on bread and complimentary items at the bill.
Vibe
Colonial architecture, white linens, live musicians. Better at breakfast or brunch than dinner.