Fast food restaurants

Mostaza

A 22-seat kitchen run by Eleni & Yassine, serving the dishes their grandmothers argued about on Tuesday nights in Kreuzberg.

San Martín 401, U9000AII Comodoro Rivadavia, Chubut, Argentina $10,000–20,000
3.6
1,185 notes from regulars
01 The story, in three paragraphs

Why everyone keeps coming back.

Mostaza, nestled in the heart of Comodoro Rivadavia on San Martín 401, stands out as a vibrant fast food destination that brings a flavorful taste of Argentina’s beloved casual dining culture. This nationally recognized chain offers a diverse menu featuring classic fast food favorites crafted to satisfy cravings with tasty, speedy service. Though the menu details are not listed here, Mostaza is known for its indulgent burgers, crisp fries, and refreshing beverages—perfect for those seeking a quick yet fulfilling meal.

Stepping into Mostaza, you’re immediately greeted by a welcoming atmosphere highlighted by friendly staff, as reflected in many customer experiences. Visitors appreciate the warmth of the security staff, notably a cheerful and approachable attendant who adds a personal touch to the welcoming vibe. The layout of the spacious dining area aims to accommodate large groups and families, making it an ideal spot for a casual lunch, dinner, or even a quick breakfast outing.

That said, some guests have noted opportunities for improvement—particularly regarding air conditioning during the steamy summer months, which could enhance comfort during peak heat. Others mention that the local branch feels a bit cramped when busy, hinting that an expansion would be welcomed to better accommodate its loyal clientele.

Customers consistently praise Mostaza’s speedy service and approachable staff, with some highlighting the helpfulness shown when navigating the digital ordering screens—a small but meaningful detail that enhances the ease of dining here. The combination of fresh, hot food and an amiable environment makes Mostaza a dependable option for families or individuals looking to enjoy a flavorful fast food experience without complication.

Value-wise, Mostaza strikes a balance: while some patrons hope for slightly more budget-friendly pricing, the quality and variety of their offerings make it an excellent choice for a casual outing. Whether you’re grabbing a savory burger to satisfy your hunger or popping in for a quick snack, Mostaza’s blend of taste, service, and local charm ensures a pleasant and reliably tasty stop in Comodoro Rivadavia’s city center.

In summary, Mostaza offers much more than just fast food—it’s a friendly hub where tasty meals meet warm smiles, embodying the spirit of Argentine hospitality even in the bustle of a fast-paced environment. For those seeking a no-fuss, wholesome quick bite with a welcoming face, this spot deserves a visit on your next trip to the city.

03 Notes from regulars

1,185 notes — the real pulse of the room.

3.6
Based on 1,185 verified notes
5 460
4 301
3 204
2 102
1 158
All Hamburgers Clean Spacious Place Waiting Time Mustard App Hygiene Vegetarian Central Location Staff Attention Economy
Jazmin Mera.
3 month ago
Muy bueno el local el seguridad te Recibe muy amablemente pero lo malo es que no cuentan con aire. Un local tan grande y nacional no tiene aire en verano se complica.PD el seguridad muy buena onda el gordito alto que tiene una mancha en la cara
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Alexander Zalazar.
3 month ago
Excelente lugar, fuí con mi familia y en mi perspectiva fue fabuloso. Se agradece a Mostaza por llegar y traer trabajo y alimentos variados. Quisiera que fueran más baratos, pero su precio si da para una salidita o para desayunar. Espero les sirva
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Brenda BM..
4 month ago
Excelente y rápido. No sabía como usar la pantalla y me explicaron. Muy buena onda
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Debora Oyarzo.
5 month ago
Buenos combos,muy rico todo! Se nota algo descuidada la limpieza. Pero la atención al público es amable y tieneuy buena ubicación En la foto, papas "grandes" República poquiiitas una desilusión
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Noemi Perez.
5 month ago
Voy todas las semanas, me encanta Mostaza, voy al local del Centro de Comodoro calle San Martin, pero veo que les quedó chico el local , por estar en el Centro el local debería ser más amplio, a veces está súper lleno.y no tenés donde ubicarte. Solo me gustaría que se ampliará ese local.
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Claudia Valeria Muro.
6 month ago
Local centrico, con estacionamiento en la calle, si encontras lugar, la atención es buena, ágil y la comida no tarda tanto, buena en relacion al precio, cuenta con todos lo medios de pago y si te bajas la app tenes promos y descuentos. Lo único que no me gusta es el pelotero en medio del local porque desde que esta, los niños corren gritando por todas partes descontrolados.
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Luciano Chavez.
6 month ago
Excelente atención, llegamos a última hora el 18/04/2025 y nos atendieron muy bien. Todos muy amables. Felicitaciones. Las hamburguesas !!!
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opinandoando.
6 month ago
A ver, es un lugar de comidas rapidas en pleno centro. La comida es aceptable teniendo en cuenta los precios, y la rapidez en la preparación también. No sabemos que hay ni que pasa en la cocina pero de momento no tuve malas experiencias. El ambiente es raro pero diría que es más culpa de los clientes mismos que del lugar en sí. Implícitamente todos se ponen de a cuerdo en comer e irse rapido lo que te hace no quedarte mucho tiempo en el lugar.
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04 When to visit & how to find us

Hours & the door on Bergmannstraße.

Opening hours
Monday (today) 10:00 AM - 12:00 PM
Tuesday 10:00 AM - 12:00 AM
Wednesday 10:00 AM - 12:00 AM
Thursday 10:00 AM - 12:00 AM
Friday 10:00 AM - 12:00 AM
Saturday 07:00 AM - 01:00 AM
Sunday 10:00 AM - 12:00 AM
Finding the door

San Martín 401, U9000AII Comodoro Rivadavia, Chubut, Argentina

05 What makes this place friendly

The details you usually have to call and ask.

Service options
  • Delivery
  • Takeout
  • Dine-in
Highlights
  • Great coffee
Popular for
  • Breakfast
  • Lunch
  • Dinner
  • Solo dining
Accessibility
  • Wheelchair accessible entrance
  • Wheelchair accessible restroom
Offerings
  • Alcohol
  • Beer
  • Coffee
  • Late-night food
  • Quick bite
Dining options
  • Breakfast
  • Lunch
  • Dinner
  • Dessert
  • Seating
Amenities
  • Restroom
Atmosphere
  • Casual
Crowd
  • Groups
Payments
  • Credit cards
  • Debit cards
  • NFC mobile payments
Children
  • Good for kids
  • High chairs
  • Kids' menu
Parking
  • Free street parking
  • Paid street parking
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