

Brick-walled space for Mexican classics prepared by hand, plus margaritas on tap.
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Reviews
The good thing about this restaurant is that it is located at a very convenient location. You get to see the famous Amazon sphere as well.
The restaurant is big and pretty.
We tried the flautas de queso and the guacamole and chips: 10/10.
The food was flavorful and thoughtfully prepared. The chips and salsa served at the beginning were fresh and addictive—a perfect way to start the meal. We also tried the corn appetizer, which was a delicious surprise—creamy, well-seasoned, and definitely something I’d order again.
The menu has a good variety of dishes, and the enchiladas were definitely a highlight—rich in flavor and cooked just right. As someone who eats vegetarian, I appreciated the veg options that were available, but it would be great to see more variety on that front in the future.
Service was friendly and attentive, and everything came out in good time. Overall, Cosco Antiguo offers a great mix of taste, presentation, and atmosphere. Definitely recommend it—especially for the enchiladas, corn appetizer, and that unbeatable chips and salsa combo!
The chairs inside, uncomfortable, no back support. The menu, typical Mexican fare. All the usual suspects are here. Vegetarian menu is limited and who I went with ordered the mushroom enchiladas. I tasted it. We both agreed it had no flavor except mushroom, I’ll give it a 3/10.
What I ordered, the camrone tacos, well it sufficed. Shrimp was cooked well, crema and cabbage was fine and even with my added habanero sauce, didn’t make a mess all over me. It was better than average but not spectacular. I’ve had better elsewhere. But it wasn’t bad. So it’s a 6/10. Like it’s fine. Good even. But not super stoked about the price for the quality at $23.
Also this cantina is a la carté so rice and beans were extra — $6 for a tiny skillet of it! It wasn’t good rice or beans. I begrudgingly ate it because I was hungry. I still give it a 4/10. At 3 or less I’ll just burn the money and not eat it, sorry starving children in Africa.
Service? Well, I guess we got service. Didn’t catch her name. She wasn’t impolite or polite. But never checked on us once and never asked if we wanted dessert. I mean I actually think I would have passed but still, service non-existent. 2/10
How this place stays in business with subpar quality I must think is just because of hungry compliant Amazonians since it’s right in Westlake. But if you want a better Amazonian food spot right next door go to Cinque Terre (Italian) which is actually worth the money, or for better camrones — Cactus. Yes it’s a small local chain but better food for the same cost. Especially their camrones. Pass on this place. It’s pretty but your wallet will thank you.
Overall,
5/10⭐
and it certainly doesn’t
Starting off, the chips and salsa were not great. The guac was especially bland, and needed way more salt. The chips felt a bit stale
For an appetizer, I got the plantain empanada. It wasn’t amazing – the avocado spread was nice, as was the cream. However, the outside wasn’t very crunchy at all – actually being quite soft.
The inside tasted a bit off as well.
Moving onto the birria quesadilla, things were a bit better. The beef in the birria was quite fatty, and cooked pretty well; I thought it wasn’t dry. While the tortillas were quite soft on the outside and flavorless,
at least the cheese in the middle provided a good overall taste.
The consommé, though, was very bad. It tasted straight up like water – no beef flavor whatsoever. I gave up on dipping the tortillas in there and just dipped them in the cream instead. Easily the worst broth I’ve
ever had with birria.
What I had was a little on the expensive side, coming out to around $35 per person. I think the portion size for the quesadilla was decent, but the empanada being $11 was a bit much.
Overall, this represents the worst aspects of South Lake Union food – flavorless and expensive, with no incentive for improvement. 4/10