Perfect tots, perfect crunch, and soft and pillowy on the inside. I ordered the double cheeseburger like it came. I always try it the way they serve it the first time. It was perfect! My wife might add a little lettuce and I might add some mustard instead of the burger sauce, but those are personal preferences. It is a perfect cheeseburger as it is served. If there is a better cheeseburger in Kansas City, I would like to know it. Because this is the best one I've had. Way to go, Cosmo Burger!! read more

Cosmo Burger - Amazing tots!! - Burgers Near Me - Lenexa, Kansas

See all

I've been wanting to try this place for a while now because I'm always looking for the best burger. This is inside Lenexa Public Market. You put in your order on a screen at the counter. Then they send you a text when it's ready. It was ready very fast. This is seriously a great burger! I got extra sauce which I'm so happy I did. I'm not sure what's in it but it's mustardy and I love that. Juicy and saucy that got all over the place when I ate it. What more could you ask for. I also got the tater tots, which were excellent. Crispy on the outside and came with dipping sauce. Probably some of the best tater tots I've ever had. Cosmo Burger is definitely one of the top five I have ever had. I'll be back for sure. read more

Cosmo Burger - Double burger with tater tots - Burgers Near Me - Lenexa, Kansas

So maybe a messy burger isn't for everyone. And maybe you like more 'craft' burgers with fancy add-ons or whatevs, and a zillion side options. Then this is not your place. BUT, if you like a smashed patty burger, house made pickles, & a signature sauce, then Cosmo Burger might be your jam. You get your patties - single, double, triple - and either get the standard dress (cheese, grilled onion, pickles) and go from there. You can even order a meatless option, a Beyond Meat patty that plays for those with alternative diet choices. Order on the kiosk and fix it up how you want (a double is just right), add on tots if you want, and they'll text you when your order is ready. The burgers can be a mess, so you may not even put one down once you start. The 'burger sauce' is a kicked up honey-mustardy condiment, certainly unique and compliments the burger seasoning well. You can wash it back with one of their local and national beers on tap or even a specialty kegged cocktail. If you wish to stay inside, then you can pull up a seat at the bar as you enjoy your burger and beverage while sportsball or other interests are on the TVs above the bar. Lenexa's Public Market has plenty of seating but if the weather is agreeable, I highly suggest being outside. There is ample seating plus in cooler weather or during cool nights, the fire pits get lit with Adirondack seating surrounding the fire. The seating is shared with other food court options, so only the Cosmo bar is dedicated to them. Enjoy your burger there or to go, but in any event, smash your smashed burger and you'll want more. read more

See all

Okay so this is an unpopular opinion, but I think Cosmo Burger is pretty average for a burger place. I'm not sure if it was all the five star reviews, or the photos I've seen, but I was geared up and ready to be blown away by this little unassuming burger joint. I came on a weekend, ordered a cheeseburger with tots and extra burger sauce - I mean, who doesn't love a specialty condiment? We ordered at the kiosk and our food came out in a reasonable time. No complaints from anyone at the table (me, my husband, our daughter, and a friend), but everyone agreed it didn't quite live up to the overall hype. The burger sauce to me tasted like a very run of the mill honey mustard. I was happy to have it, but it wasn't exactly what any of us were expecting. I think it's really more of a 3.5, but I'm rounding up to 4 stars since the burger was tasty and I do think I'll return sometime when I'm in the area. Overall - Cosmo Burger delivers a good, standard burger that will 100% scratch the itch you have for a good old fashioned cheeseburger. I'll be back to see if maybe I just missed something, but for me it just wasn't the best in this genre. read more

Cosmo Burger - the interior of the restaurant - Burgers Near Me - Lenexa, Kansas

See all

Great burgers! I was a little bit disappointed that they had no onion rings or fries. However, the tater tots are great & you get a generous portion. A double-bacon cheeseburger with tots and a craft beer were all I could eat. read more

Cosmo Burger - a man standing at the counter - Burgers Near Me - Lenexa, Kansas

See all

I was super excited to try this spot and what a poppin' place! You order at a kiosk and get a text when your order is ready. It was a Friday night so our order took a few minutes. The burgers themselves were classic old fashion cheeseburgers. The cheese was so melty and soft. The sauce wasn't anything special in my opinion-- similar to a honey mustard/burger sauce. The tater tots were crispy but would have been excellent with some salt or seasoning. read more

I really wanted to give this place more stars, but the customer service during each have been extremely poor. If this review was solely based off of the food I would give it 10 stars if I could! My first visit it wasn't busy and I came with my family and the bartender did not acknowledge us. We discovered that we can pay at the kiosk or online after standing there for a few minutes assuming it was like all the other restaurants inside the public market where the person behind the counter took the order. I ordered a single without pickles and my partner order a triple the same way with sauce on the side for both. We got everything on the burger except the grilled onions? Despite missing something I would call a key piece, the burger was still very good! This time I came on the way to an event to grab the special "red zone" burger. I tried to order in the kiosk, but did not see an option to add extra patties to one of the special burgers. I sat at the bar assuming it would be easier to order here. 10 minutes passed TWO servers looked at me and served everyone else around me, but me. I assumed like last time that maybe we could not order at the bar, but then I overheard one of the servers take another customers order. I understand it was busy and I have worked in the service industry for over ten years. A simple acknowledgment goes a long way since I'm sitting at the bar, patiently waiting with a smile. I believe it is extremely unfortunate that some businesses could thrive more if they hired people who actually want to help others. As I was checking the burgers to make sure everything was on them since the first time it wasn't and I wasn't eating here this time, one of the servers I assume felt offended? Very dramatically walks up and asks if everything was okay....well if you would have asked me that when I sat there for 10 minutes instead of staring I would have let you know then it was not, but since there are different ways to order without having to communicate with the people behind the counter I got the job done! The public market seems like a great place to be with family and friends and I do not want to feel uncomfortable coming to eat such incredible food! I know the back of the house (cooks) cannot control how the front of the house (servers) treat the customers directly, but I do think it goes hand in hand. Again, the burgers were EXCELLENT! The onion ring and house made bbq sauce paired perfectly on the freshly smashed patty. I hope this special finds a "special" place on the menu because it can easily be a staple! Just don't want to climb through trenches of bad service to enjoy it. read more

See all

Yeah buddy! This was just the burger I needed! Ordering at the station was very easy. The sign said it would be a 10-15 minute wait, but I think my food was ready in about 5 minutes. The burger was fantastic. It was a classic smash, with a great sauce. I was worried the sauce would overpower the meat, but it was a perfect complement. The tots were an ideal golden brown. The meal was delicious and cost effective. I'll definitely be back! Great good, great location! read more

See all

Fantastic smash burger if you ask me! The menu was small but simple and I loved that. The only reason I am giving it a 4 star is because it could be a little cheaper. If you want to add anything to your burger you're talking at least a $2 up charge for something like bacon or green chilies. The homemade sauce was stellar, I ended up having to go buy an extra sauce for .75 cents because I am a saucy girl. The wait was about 15 minutes but we grabbed a beer at the bar while we waited. Overall the taste was there for me but the price wasn't. read more

See all

This is Lenexa city center and it is a food court. It is like dining in a mall but more expensive. I wish I would have known this. That being said, the burgers were fine. If I was close I'd stop back by for a burger but I wouldn't buy $1.50 worth of tots for $4. read more

The burgers here are delicious! The sauce they use is so flavorful. We love the original Cosmo and this place is just as good. You order on a tablet and a few minutes later you get a text when your order is ready. The vibe at the Lenexa market is very casual. We come midweek and sometimes you'll see a balloon artist and sometimes they have story time. read more

See all

This new burger place turned out to be a good addition to the restaurant options at Lenexa Public Market. The single cheeseburger ($7.00) and tots ($4.00) were ready 10 minutes after I ordered at one of the two kiosks. Pricing was a la carte without any combos. The burger was fair to good and fairly sized with a perfectly cooked patty on a fresh bun, while the generous portion of tots was moist and delicious with a creamy dipping sauce. The restaurant shares the clean and nice dining area with background music at Lenexa Public Market and offers a full bar with four TVs. I'm thinking 3.5 stars and rounding up for the tasty tots. read more

See all

What a fantastic burger! Located in the Lenexa Public Market, the vibe of this place is fantastic. The service was great and the food - seriously one of the best burgers ever! It was loaded with caramelized onions, mustard, and pickles. The flavor was on point! We also had the Tater Tots which were okay - would have preferred fries. But I would totally recommend Cosmos! read more

Cosmo Burger - Cosmos burger box - Burgers Near Me - Lenexa, Kansas

See all

They don't have a lot of options, but that's not a bad thing at all! They're so simple yet so good! Highly recommend

These are probably one of the better burgers in the KC area, but I think there's room for improvement in execution. Perhaps a few more combination options in terms of toppings, or at least a better balance on the standard burger currently offered would be a gamechanger. read more

it doesn't get much better than a cheeseburger, tots, and ice cold beer on the menu: double cheeseburger with an egg, single cheeseburger with an egg, tots x 2, and draft beers our thoughts: there's a reason the burgers from Cosmo Butger are one of KC's favorites. simple ingredients done really well makes for a truly delicious burger, and one we keep coming back for our tip: definitely don't skip the tots and highly recommend adding an egg, it makes an already delicious burger even more decadent read more

Cosmo Burger - Double Cosmo Burger and Tots - Burgers Near Me - Lenexa, Kansas

See all

The burgers here are simple, but don't let that fool you! They have SUCH great flavor and there are ways to customize it to your liking. I ended up foregoing the pickles on mine and adding chiles instead and it's definitely the way to go if you like spicy burgers! read more

I ordered the single burger with tots. Sauce on the side because it is my first time eating here and honestly, it was delicious. Tots were crunchy and burger was tasty, very flavorful. Definitely recommend for a quick bite! Service was fast and the lady was super nice. read more

Cosmo Burger - a sandwich and onion rings - Burgers Near Me - Lenexa, Kansas

I was not prepared for how good this burger was. I ordered a single and added a fried egg and chilis to it. The egg was perfectly cooked and it had plenty of chilis. And although it looks like it would be super messy, it really wasn't. The atmosphere was really cool too. Located inside Lenexa Public Market with many other food options. Will definitely be going back! read more

A last minute dinner date with a friend landed my wife and me at Lenexa Public Market's Cosmo Burger. Not only was this my first visit to Cosmo Burger, but it was also my first time at the Lenexa Public Market. It's a cool venue - kind of "food court-y" with restaurants and vendors around the perimeter and common shared seating in the center. I had heard the buddy who invited us talk about Cosmo Burger in the past, but my preconceived notions were off. Unlike most burger places, their menu is very simple: You can order a single, double, or triple. There are only a few options for customization, and the only side they sell is tots. They have Coca-Cola products available from the fountain, and they also offer a selection of wine, beer, and cocktail choices. That said, I ordered a double burger with no modifications, a side of tots, and a whiskey smash. The drinks were made immediately and we took them to find a table. Not long after that they texted my buddy to let him know our food was ready. The burger wasn't what I expected: The patties were thin (don't equate that to mean "small"-- they were generous)... but this was clearly a "smash burger." The bun was fresh and delicious, the meat well seasoned and cooked perfectly. The cheese was delightfully melted and there were a couple of pickles which added a nice pop of flavor. The tots were as perfect as tots get. Crispy on the outside and tender on the inside. My drink was also great... not too much. Not too little. The only reason I didn't give it five stars was the price. While the food wasn't "over" priced, it also wasn't a bargain. I think what you're paying for is a consistently good product served in a really cool space. Would I go back? Certainly. Would I take a friend here? Absolutely. All in all I find it to be a winner. read more

See all

Decided to try Cosmo Burger in the Lenexa public market today, and I'm so glad we did! The burgers are smashed fresh, well seasoned, and the potato bun is light and fluffy! The tots were crisp, fried perfectly, and you can't miss out on having burger sauce on the side with those. The staff was super friendly, and my only regret is that I missed out on the pimiento cheese burger special but they were running for a limited time. read more

Cosmo Burger - Single with cheese, and tots - Burgers Near Me - Lenexa, Kansas

It was our first time to the Lenexa location- and Cosmo definitely fits in as a cornerstone in this food hall. The woman at the counter was friendly and the vibe is very casual (bar seating only!) The burgers fresh from the grill were perfect. The tots and sauce are worth the drive from any part of town. They have a great cocktail menu, too. read more

Didn't eat here. Walked up and looked to order and sign says "add egg $1". Asked why couldn't see it on electronic kiosk: " we don't do eggs on Sat". If I choose for there to be a next time I'll make sure to read up and maybe call and make sure I have all the unwritten rules down pat first. read more

I'm so glad I finally got around to trying Cosmo Burger! I love how simple the menu is, making it easy to decide what to order (I usually have a very hard time ordering at restaurants). The double burger was a perfect size, and when combined with the tots it made the best meal. The burger was juicy and delicious and the tots were cooked to perfection. The cookie was slightly too sweet but the sweet tots with icing were incredible and made up for the cookie. Good service, kind workers. Wonderful experience all around! read more

Cosmo Burger - Desserts - Burgers Near Me - Lenexa, Kansas

See all

Cosmo Burger serves delicious smash burger style hamburgers. I ordered a double, which was plenty of food. I got the tots as well. With a beverage, my total after tax and tip was $20. A bit pricey, but very delicious and worth it. The burger sauce was delicious on the burger and to dip the tots in. Tots were cooked to crunchy perfection. This place is an awesome addition to the Lenexa Public Market and worth checking out for sure. read more

Best burger in KC, nothing compares! I was so excited they opened closer to us, we have been at least 4 times already. The most delectable burger in the city, thin crisp patty, with homemade pickles, onion, cheese on a gluten free bun and a side of crispy tater tots. Perfect meal! They also make their own burger sauce, I didn't think I would enjoy it but it's the perfect compliment to their burger. Jason and I normally order a double to split and a side of tots. I have added the hatch green chilis, woof they were a little too spicy for me. They have other special hamburgers they offer as well. We typically online order to pick up quick. They do have a bar to sit and enjoy your meal or hang out for a bit. I love their GF bun, it's not a nasty Udis bun, believe it's a local one. You have to try them! Their burger is in my top 5 in the US...and we have tried a lot. read more

Ordered my burger with no pickles, which doesn't seem like it should be a hard request, but evidently it's an issue for the cooks here. When I took my burger back to the counter, the bartender told me that it'd be remade, and I went and sat back down. 3 minutes later, to my surprise, the cook emerged from the kitchen with my "new" burger, which he had just scraped the pickles off of(except about a 1/4" piece he missed) and tried to pass it off to me as a "new" burger. I'm not sure what was worse, the fact that he just scraped it off, which I could have easily done, if I still wanted to eat a burger that tasted like pickles, or the fact that as I took it back the second time, and asked for my money back, that he only then offered to re make it. Probably should have just done that in the first place right? There are certainly better burgers around town I can get for less than the $25 I just about spent for this..... So glad that I pre tipped also, to get that level of excellent service! Needless to say we won't be back.... read more

I have been wanting to visit Cosmo Burger since the reviews started trickling in 2 years ago when they were a part-time pop-up in a bar's kitchen in Waldo. With their limited hours and my schedule, I never could connect, until they opened a full fledged experience inside the Lenexa Public Market in August 2022. Three months in and I finally pulled the trigger and drove the 30 minutes from the Northland to western Lenexa to see if the hype was for real... and was it? I'd have no qualms about getting back in the vehicle tomorrow and making a repeat trek. Cosmo just entered my KC "Hot 100" burger list in a 2 way tie for #1 and a Top 5 ranking for USA. I ordered the double cheese slaw burger. It was not on the menu at the restaurant, but was listed on-line. From my first bite, I was hooked; actually just from unwrapping the burger and seeing and smelling it, I knew I was in for a treat. The gooey cheese dripping from the thinly smashed salted patties, the crisp, tart house made pickles, the grilled onions, the secret burger sauce, the crispy hot thick onion ring and the tart vinegary cabbage slaw all melded together to create a most righteous fulfilment of savory seductiveness. Bee-you-tee-full!! Tots were perfectly crispy and the burger sauce for dipping was unique and a welcome alternative to ketchup. A bar for seating with beer and a few pre-made cocktails on tap add to the experience, as did the friendly female employee. Nothing short of a five star sandwich!! read more

Cosmo Burger - Burgers Near Me - Lenexa, Kansas

See all

Enjoyable food and delicious drinks for a cheap price and at a quick speed. Food was vegan friendly. read more

Cosmo Burger - Burgers Near Me - Lenexa, Kansas

HANDS DOWN THE BEST BURGER YOU WILL EVER PUT IN YOUR MOUTH! I would travel the world for this one burger. My husband and I have been eating Cosmo Burger for about 2 years and it is constantly in our rotation for our weekly eat out place. The pickles. The sauce. The cheese. The bun. THE BURGER PATTIES. MOUTH WATERING. Oh, did I mention the tots? Every single thing about Cosmo Burger is mouth watering. I love that every single time we come here, it always tastes the exact same. Also, the staff is the best! If you're looking for the best cocktail, order the pomegrenate margarita. Its to die for! P.S. I WISH THEY WOULD COME OUT WITH MERCH SOON!!! read more

Excellent burger, it was juicy and tasty. Despite the fact that it was a Saturday evening with a lot of visitors, we waited for our order for no more than 30 minutes. The service was good, the staff came to us several times, my friends and I liked it read more

Simple menu of burgers with option for tater tots. Cocktails, and KC-local beers are offered on-tap. The double burger was juicy and delicious. Cheese was limited to American, which was the only disappoint. The pickles were better than average, the grilled onions added a nice texture, and the flavorful dressing elevated the usual ketchup/ mustard offering. The bun was fresh and just the right size. Definitely recommend and looking forward to the next burger fix. Lastly, I really appreciated their use of recyclable paper containers instead of foam or plastic. read more

Loved it so much I came back twice in 48 hours! This burger joint has been on my must try list forever and this newer location in the Lenexa Public Market is much closer to my home made it so easy to finally try this delicious burger. The menu is simple and straightforward with just a handful of choices. We really appreciate the vegetarian option as my husband doesn't eat meat. The tots are amazing crispy fried goodness. I would love to see their take on French fries someday. Definitely get the double patty if you're feeling pretty hungry. Truly one of the best burgers in the KC area. read more

Cosmo Burger - Burgers Near Me - Lenexa, Kansas

See all

For sure one of the best burgers I've ever had. Got a double without pickles, but the grilled onions and the burger sauce make this burger melt in your mouth. Agree with other reviewers, one of the best burgers you'll ever eat and it's very affordable for what feels like a gourmet burger! Tots were hot and crunchy...Every. Single. One. Great atmosphere as it's in a public market with other food options. Highly recommend! We'll be back for sure! read more

Very good burger. Nice flavor, done to smash doneness. I am still not sold on tater tots. It's like being exposed to foods in an Army mess hall kind of thing with me. read more

I can't help but give the best burger in KC a 5 star rating but this location had so many delays in opening that it nearly moved me from my Openly Secular approach to life to a full blown Atheist. How can you believe in the existence of God who would deny us the happiness of Cosmo Burger? (Yes, I have 1st world problems. So do you. You are on Yelp and are looking for a good place to eat.) I have already written a lengthy review on the Waldo location. Check it out for more about how much I like this place. The Lenexa location is just as good as the Waldo location with one big exception - its closer to my house and has better hours. I would gladly welcome 7 days a week with lunch and dinner available but I will take what I can get for now. I am very hopeful the Lenexa crowd will support this place and help drive demand for more top notch options in the area! read more

Absolutely delicious! The tots were seasoned and cooked to crispy perfection, the dipping sauce was tasty, and the burger was really well-built with a great combo of flavors. Being able to order online and just roll in and pick up was even better. read more

Amazing burgers, amazing vegan burgers + house made vegan cheese. Generous sized tots that are cooked perfectly as a side, served with delicious burger sauce. Best vegan burger I've had in a long time, & the chopped chiles as an add on make it perfect! read more

Cosmo Burger - Burgers Near Me - Lenexa, Kansas

Great burger with iffy service. Despite being a week night with very few patrons, we waited over 30 minutes for our order. Service was poor with staff distracted by their phone, who failed to provide everything ordered until providing our ordering receipt. If the burger were not so good, would not be back. read more

Service was excellent. Food not quite as good as I remembered but was still ok. Employees friendly.