Went to try this place out; ordered online and got the basic burger. I picked it up close to closing and the cashier was friendly. The burger itself was very good. Rich and buttery, but the condiments and pickles helped cut through it. The prices do run on the more expensive side for a burger place. I'd stop by again. read more

There are quite a few smash burger joints around and Cosmos is definitely one of the best! Cool vibe, good food and great prices! The burgers are always cooked just right! They are nice and juicy! Top it off with fries and a lemonade and you've got an awesome meal! read more

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For what I spent, the food was definitely worth it. I don't normally clear my plate - that burger and truffle fries disappeared. Even my 5-year-old nephew, who's extremely picky, ate his entire burger. The service was tremendous, and I'd gladly go back again. I love how it feels like Oceanside with the homely look and local articles. read more

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Pretty good burgers. This hole-in-the-wall burger joint offers gourmet "smashed style" burgers. By smashed, I mean the patty has been smashed flatter and tends to have crispy edges. Think "Freddy's frozen custard & stakeburgers" as a comp. Overall, this will hit the spot for those looking for burgers with more oomph. For burger aficionados, this is a must try. * Their chicken tenders are premium and generous. * These burgers tend to be big on both taste and grease. * Parking is going to a pain, especially during the summer months. Be prepared to walk a bit. read more

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Ok so me and a friend went to this spot because the reviews were all saying for the most part that Cosmos and their burgers are flavorful. And sadly that wasn't the case when we went. I got a truffle burger and the burger was cooked well, but I couldn't taste any seasoning, the only flavor I got from the burger was from the grilled onions and pickles. The truffle sauce had very little flavor as well but really the burger wasn't bad so if you want a burger with minimal seasoning then this could be the spot for you. Now for the chicken tenders, they weren't cooked the best. The tenders also didn't have seasoning, and were a bit dry too as well. I got the garlic Parmesan tenders and the sauce they put over the chicken was bland. So overall it's not a bad restaurant, but for their prices I would want at least decent seasoning on my food but if you're a person who doesn't care for seasoning this is the spot for you read more

Cosmos Burger - Truffle Burger Garlic Parm tenders - Burgers Near Me - Oceanside, California

The Spicy Jam and the Cosmo Burgers were stunning! Frings were ample and delicious. Go Here, you won't be disappointed!

Service was really great. Greeted by a friendly and helpful person. Our food was out pretty quickly, but not too quick, you know? First bite of the BBQ burger and I was impressed with the texture of honestly every layer of it. I'd show you a picture but I ate it too quickly. read more

Cosmos Burger - Results. - Burgers Near Me - Oceanside, California

Always a joy with best ever burgers and chicken served with pride and with real china plates and cutlery. We visit year after year and the food only gets better each visit. Katlin took great care of us this visit and will take great care of you also! Don't miss this family run gem. read more

I love this place. Burgers are amazing. A bit on the salty side, but it crushes that crave for a smash burger. The fries are golden, and so are the staff. read more

Cosmos Burger - Better Mac - Burgers Near Me - Oceanside, California

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After visiting a nearby competing burger joint, we hopped on over to Cosmos Burger to see which we liked more. Since this place wasn't as busy, we didn't have the most positive outlook, but were definitely proven wrong after eating! - PARKING - Street parking only, I'd imagine it can be difficult to find a spot since you're on the main road. We managed to slide into a spot right next to the entrance! - SERVICE/ENVIRONMENT - The inside isn't very large at all, with some bar seating, a few 2-4 person tables, and window bar seating. The walls are decorated with quirky art, and I liked the vibrance of the entire interior. The man that served us welcomed us in and was very friendly. After we ordered, the food didn't take longer than 10 minutes to come out. - FOOD - Cosmos Burger: When this came out, I was pretty shocked at the size of it! You could definitely get full off one burger, but luckily my fiance and I were sharing. It was nice attention to detail as they provided us with two plates and a knife! The edges of the patty were crisp, and the inside meat was juicy. There aren't any veggies, but I think if it did have something to cut the fat, this burger might be close to perfect! Tater Tots: Pretty darn crispy! I have had crispier tots, but these were solid. I'm a tater tot lover, so I always pick these over fries if both are on a menu. Hibiscus Lemonade: I felt like this was a bit too bitter rather than tart for my taste. It was still a nice break in-between each greasy bite of burger though. - OVERALL - One of my top burger spots for now! Really interested in trying their other burgers that have veggies inside them.. read more

We stopped here last night because I wanted to try their vegetarian cauliflower burger. The woman taking our order was super kind and explained the menu clearly to me and patrons who ordered after me. There is a small seating area next to the cash register where you can watch their two TVs. I asked if it would be possible to put the NFL playoff game on one of the TVs and she made it happen. 10/10 customer service. The food was pretty yummy too. I probably would not get the fried cauliflower burger again because it was very large and I could primarily just taste grease, but the tots, fries and chicken sandwich were good. The people sitting next to us were raving about the burgers and truffles fries they ordered. read more

Cosmos Burger - Hot chicken sandwich with tater tot's and side of truffle fries - Burgers Near Me - Oceanside, California

Keri hooked us up! Such friendly service and a warming/inviting place. It's a new burger joint and if they keep doing what they're doing I think they'll be around for a long while lol. I'll start by saying it's a bit expensive for a "burger joint" but you come here if you want a good quality burger and atmosphere. It's a great burger so if you're looking to indulge, then pop by. We ordered the truffle burger, spicy jam burger, tots, fries, and a Jamaica lemonade. All of it suuuuper tasty. The tots were so nice and crispy!!! I'll be backkkk read more

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I heard good things so had to try Cosmos tonight. My bride got the Truffle Burger and I got the Cosmos Burger. We split a Chicks Fries. The draft beer was served up properly in a cold glass. Our server, Elan was very good. Enthusiastic, fun, and knew the menu very well. Our burgers were truly fantastic. Two medium size smashed patties with a nice rough crunchy edge but super juicy. I had a bite of the Truffle Burger and loved that as much as mine. The Chicks Fries come with a chopped up chicken tender and the bits of chicken were done perfectly. Tender and not a bit dry with a little crunchy breading. Plenty of cheese and caramelized onion not just dumped on top but properly portioned throughout the order. My bride was a little disappointed there wasn't a Pinot Noir choice but she was fine with a Diet Coke. There are a lot of great burger choices in North County, but this should be very high on anyone's list. Brightly lit, nice little (beer and wine) bar, quality, tasty food and a really nice person serving it up. We'll definitely be back, and we'll bring friends too! read more

Reeeeally good smash burgers!! The cheese sauce on the fries was immaculate. If you have time to stop by, you should! It is a little pricey, but the price combined with quantity and flavor of food makes it more than worth it. 10/10 would return read more

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Received a coupon for 50% off a second burger, so stopped for lunch. Ordered a Cosmos and a Better Mac. Impressed with the size of the burgers, the toppings and the bun. But one of the ingredients in the burger patties is apparently barbecue sauce, which overpowers the tastes of the sauces and toppings, and even the beef. I hate barbecue sauce on burgers - I want the meat taste when I eat burgers. When I want barbecue flavor, I go to a Bar-B-Q joint. For me, this is a no-return place. read more

Cosmos Burger - Cosmos - Burgers Near Me - Oceanside, California

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The hamburger was just right very tasty can't wait to go back the service was outstanding

Food, amazing! Host, amazing! Time to table, fast! Deserts, freshly made tiramisu! Not to mention, the place was clean with fresh flowers on the table and overall uppity. Why are you still reading? Just go try it already! Seriously, stop reading and at least call, try it. read more

Cosmos Burger - The inside of the restaurant. - Burgers Near Me - Oceanside, California

SOOO bomb! We tried three different burgers and all had so much flavor! We ordered the spicy jam, better Mac, and truffle burger. $15 each burger. It was so good that we came back twice during our trip to Oceanside. Staff were friendly. Delicious food. Highly recommend !!! read more

Tried this new burger place out. It was pretty good. The burgers had lots of flavor. I really liked the chicken tenders! They were so juicy and crispy. I would get them again. I would recommend this place to family and friends. read more

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A decent burger with horrible fries for 2X the price of In n Out. Service is great, the place was nice and clean. It was really sad to eat a great burger with bland fries that tasted like they were taken from the dumpster behind a McDonalds. If your burgers are fresh, you gotta make some fresh fries too. Bummer. read more

Burger was good, little greasy, nice bun taste. Reminds me of shake shack burger type style. Got take out, interesting seating area inside. The register person was nice and friendly personality. read more

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The burger here is *really* good. When they served it to me I was surprised with how heavy it was. The clear star of the show. It's why I'm giving the place a four. The service was nice. The gentleman behind the register was friendly enough. It's got a decent vibe to it, nothing really to take note of. It's definitely on the pricier side. If and when (and I think there is a when) I come back here I'm likely just going to get the burger because... ...The fries and onion rings...Honestly? The weakest aspect of the restaurant. I would have walked away with a stronger impression of the place if I just got the burger. If they leveled up their game here and used way better ranch dressing, I could justify how much I spent for my meal, but that aspect was really weak especially when you consider one of their neighboring burger spots has mind-blowing onion rings. I find myself really wanting to like this place. I'll definitely return and try something else on their menu later. read more

Cosmos Burger - Fries and Onion Rings. - Burgers Near Me - Oceanside, California

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Food and service were excellent, as Usual. Best as it gets . The Lavender lemonade is a tasty alternative to any of their other drinks and goes down well with any Food they sell. Delicious indeed. read more

I recently heard about Downtown Oceanside's newest burger joint and I decided to give Cosmos Burger & Beer a try. They are conveniently located on N Coast Hwy right near the heart of all the action. The interior is small, but can seat couples and a few groups and they also have "bar seating" and a few chairs facing outside to catch some people-watching. The interior decor is colorful, trendy and hip and has many callbacks to Oceanside, so I can see them trying to fit-in and win the hearts of the local community. Their menu has a variety of burgers, fries, beers, lemonade, kombucha and they even have an artisan hotdog; with everything being under $16. *NOTE* Although there is no Kids Menu, if you ask, they have food options & portions for kids. I enjoyed my Spicy Jam Burger, which wasn't too hot and very delicious. I was informed by the owner that they make every patty using the brisket meat of the beef. This helps to retain all the flavor in every bite. I also enjoyed my truffle fries and they were seasoned perfectly. I highly recommend these. Their monkey fries were also pretty tasty too. The magic really happened with their truffle honey chicken tenders and I would order these again & again! They were crispy on the outside and juicy on the inside. I didn't try their beers, but I REALLY enjoyed their housemade lavender-lemonade and hibiscus-lemonade. Although I didn't care much for their tiramasu (it was the soggy texture), I enjoyed everything else I ate. Overall, because their price-point, I can appreciate COSMOS Burgers & Beer and consider them a nice addition to the downtown dining scene. read more

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Fantastic ! We love to try burgers all over the world. How great to find an excellent burger joint right in our backyard of O'side. Service is very good, attentive. (order at counter, they bring it to you). Burgers are cooked fresh, so it takes a few minutes longer. Juicy, Cosmos sauce is excellent, Brioche bun, lightly toasted, excellent. Chicken strips, white meat. Soft. Airy. Been there 4x. read more

Absolutely amazing burger with special sauce! Tasty, juicy and cooked perfectly We'll definitely be doing this again

We're back in Oceanside! Didn't have time to try this place last time! We made time today! My husband had the spicy jam burger and I had the cosmo's burger. We were surprised that both came as "double ". We both enjoyed our burgers but our only complaint was they were greasy. We also ordered truffle fries and cauliflower bites. The fries were good but the cauliflower bites were so delicious! It was the best part of our meal! We sat at the table facing the street and it was a beautiful day with a nice breeze. Also, if you check in on Yelp, you get 20% off! Ate good for under $40! Very nice experience! We will be back! read more

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Yeah, maybe I missed something, but everything we tried here today was very mediocre. Don't get me wrong, for burgers and hot dogs, it was all very visually appealing, but flavors were lackluster. We weren't fans of the hot chicks sandwich, and the cosmo fries were meh. Overall a pretty mid experience. Maybe it was just an off night? read more

Cosmos Burger - OG - Burgers Near Me - Oceanside, California

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Excellent vegetarian sandwich. It was crunchy and large. Definitely coming back. Kids had the burger and hot chicken. They loved them. The young lady that helped us was super sweet and helpful. read more

This is my favorite burger spot in north county. The burgers are mouth watering. The cosmos burger is my favorite. Friendly staff. Great location. read more

Amazing burgers! The food came out fresh and hot, and the cheese was melted and delightful. They add two patties per burger as a standard. Everything was flavored really well. read more

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I had driven by a few times and was tempted to give the place a try. We walked in 11:19 and asked if it was ok to still order a guy with a long pony tail came out of the kitchen to see us and walked right back in and ignored our question if we could still order. A simple hey no sorry would have been sufficient :) read more

Cosmos Burger - Closes at 12? ignores customers at 11:19 - Burgers Near Me - Oceanside, California

This spot was super good in flavor and presentation but I will say the burger was pretty messy but that isn't always a bad thing! I got the Cosmos burger that came with grilled onions and their house sauce which was really good and seems like it was mustard based, but I am not too sure. It was also pretty big, I wanted to eat it all but I had to stop for the last 3 bites because I was getting overly full since I also got a side of truffle fries. The sides are definitely shareable so if you are with another person sharing would be best because there was no way I could finish them! The food hall actually seemed pretty busy when we were there and my meal came out so fast, I was surprised but also very excited since I was starving. We have been coming to the food hall a lot more recently and I have been loving it! read more

Cosmos Burger - Truffle Fries - Burgers Near Me - Oceanside, California

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The burgers were fantastic! Not your average burger joint. Restaurant is extremely clean and fast friendly service. Perfect stop after time on the beach. We will be back! read more

Really really great burgers and fries ! Also really excited to try the chicken sandwiches and onion rings look irresistible. The nicest staff was very friendly. Ambiance nice, clean just the right hip vibe. Also house made lemonade varieties and even some beer adult drinks as well. read more

Came here for the first time this afternoon. I got a FB BOGO, so we decided to give it a try. Service was great, and the food was delicious! read more

Cosmos Burger - BBQ burger, frings, and basic burger. - Burgers Near Me - Oceanside, California

Always surprised when I come here, always so good without the line at tanners. Love tanners too but cosmos ALAYS hits good too!

This place was really good!! The worker was very helpful and friendly! We got burgers this time and let me tell you, I'm obsessed with the spicy jam burger! The fries come in a big portion and we're loaded up. I loved sitting facing the street so we could people watch while we ate. The table settings were really cute and they were real flowers! Next time we are definitely going to be trying the chicken sandwiches! I'm excited to come back! read more

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I had the Cosmos burger with truffle fries and both were the best I've had. Everything was hot and fresh. Quick, friendly service with the cleanest windows so we could people watch while eating. Loved this place! read more

Cosmos Burger - Cosmos burger with truffle fries - Burgers Near Me - Oceanside, California

This seems to be a trend around north county towns... Smash Burgers. I was cruising coast highway by foot and stumbled upon Cosmos. I knew I recognized this logo because they also have a spot at WindMill Food Hall in Carlsbad. Eren approached me immediately and asked how he could help me. I was very impressed with how welcoming this spot was. The burger came out almost immediately. When I took my first bite I knew that their food has been a slow craft of perfection over time. They have limited seating that lets you look directly onto coast highway... from the smoke shop to the vacant restaurants there is always something to watch while enjoying your meal here. I recommend this if you're looking for something familiar yet unique at the same time! read more

Cosmos Burger - Spicy Jam Burger w/serrano, herb aioli, cheddar and greens - Burgers Near Me - Oceanside, California