OSA: Where to Eat in Madrid

Why OSA matters right now

Ask anyone tracking the Madrid dining scene over the last few years which opening actually changed the conversation, and OSA comes up fast. Jorge Muñoz and Sara Peral both trained at Mugaritz, the Basque temple of culinary experimentation just outside San Sebastián, and when they set up their own kitchen in the capital, expectations were already high. What followed wasn’t a quiet, gradual build — OSA arrived as one of the city’s genuine buzz restaurants, the kind of place that gets talked about at other restaurants’ bars.

That pedigree matters because it tells you what to expect in spirit, even before you sit down: a kitchen shaped by a philosophy of pushing Spanish ingredients and technique somewhere unexpected, rather than replaying tapas-bar comfort food. You come to OSA not for a quick plate and a caña, but for a considered, chef-driven meal.

Getting there

OSA sits within Madrid proper, and like most destination restaurants in the city center, it’s realistic to reach by metro or on foot from the surrounding barrios, with taxis and ride-hail apps a straightforward backup if you’re coming from further out or don’t want to navigate transfers after dinner. Because exact street address and the nearest metro exit are the kind of detail that’s easy to get wrong secondhand, look up OSA’s current address on Google Maps or the restaurant’s own site right before you leave your hotel — treat this as step one of the evening, not an afterthought.

What to expect at the table

Don’t go in picturing a fixed, familiar script. Restaurants staffed by Mugaritz alumni tend to build tasting-menu-style experiences where the sequence of dishes is itself part of the storytelling — a slow unfolding rather than a printed à la carte you order straight down. Expect the kitchen to lean on seasonal Spanish produce treated with technique borrowed from that more experimental, ingredient-interrogating school of cooking.

Beyond that, resist the urge to look up a leaked menu online and lock in expectations — chef-driven places like this change dishes with the season and the market, and locking in specifics before you’ve even confirmed your table date is a good way to be disappointed when the plates in front of you don’t match a menu that’s since moved on.

Booking and timing

This is the single most important practical fact about OSA: it is genuinely hard to get into. A restaurant founded by two Mugaritz veterans that immediately became one of the city’s most talked-about openings does not keep empty tables lying around. The moment you have travel dates for Madrid, that’s the moment to start trying to book — not the week before.

Reservation systems for buzz restaurants like this often open windows weeks or months out and fill within days, so check OSA’s own website or booking platform as early as your trip planning allows, and be flexible on which night you can get if the calendar is tight.

Before you finalize any plan around OSA, double check the restaurant’s current opening days and hours directly with them — hours at a young, fast-evolving restaurant can shift as the kitchen settles into its rhythm, and nothing sinks an evening faster than showing up to a service that’s changed.

How to visit like a local

Madrileños who chase the city’s best new openings don’t wait for a table to magically appear — they book the moment reservations open and treat that calendar date like an appointment. Do the same: set a reminder for whenever OSA’s booking window releases, rather than calling a day or two out. When you arrive, keep in mind that tasting-menu-style restaurants in Madrid generally run on a paced, unhurried rhythm — this isn’t a place to rush through before an 11pm show, so block out your evening rather than sandwiching it between other plans.

Payment at this tier of restaurant is virtually always by card, and service charge conventions in Spain mean a large additional tip isn’t obligatory — rounding up or leaving a modest extra amount for genuinely excellent service is the norm rather than the American-style 20%. The mistake visitors most often make with hot-ticket restaurants like OSA is assuming a big-name write-up means walk-ins are fine; here, that assumption will likely leave you outside a full house. Confirm, then commit.