One of my favorite Diners in San Dimas, food is always good, very big menu and everything looks delicious, I usually order a burrito but this time I had the Steak Salad, portion was huge and everything was fresh. Been coming here for years for a quick bite and the prices are very reasonable for the amount and quality! Service is always good, very friendly staff and always smiling whether it's togo or dine in. Ambience is very chilled and relaxing, never loud. Highly recommended!! read more

I love Kosmos ! What a great Sunday this morning . Biscuits and Sausage gravy !!! Outstanding . Split a Bacon Breakfast burrito and had a delicious cup of coffee Customer service is absolutely the best , making Kosmos the best in the SGV . read more

They really need to change their policies on an extra side of ranch. Something so small really makes us not want to return. My family just spent $50 on two burgers and chicken strips and fries, but an extra ranch dressing was not permitted. How can things this petty be worth losing business over? There are better places to give our business to. read more

A friend recommended this spot for the breakfast burrito, so I stopped in to give it a try. It's a cool neighborhood burger joint, very casual and not fancy, with indoor and outdoor seating plus a drive-thru. They serve breakfast all day along with the usual burger stand staples. Service was friendly and quick. The vibe is super laid back. Families with kids fresh from soccer games, groups of friends hanging out. It's that kind of spot. I ordered the Everything Breakfast Burrito without ham. It came packed with bacon, sausage, eggs, cheese, and hashbrowns. The tortilla was fresh and tasty, but overall the burrito ate a little dry. For me, the hashbrowns dominated too much, and the eggs, sausage, and cheese didn't get a chance to shine. No sauce inside either, so ketchup or some salsa on the side is a must. Next time, I'll probably try one of their breakfast specials. Looking around at other tables, I was definitely jealous. Everything else looked pretty good. read more

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What a fantastic spot to get a great breakfast burrito. Being a So Cal born and raised adult it's a must have with the quality and taste you expect. read more

Although I mentioned the food was good, they finally put up an electronic menu; fantastic. Congratulations. You have to go digital! The food has always been good. My wife loves the hamburgers and I love the chicken melts. I do agree with Michelle M., but they quality has gone up since her post. read more

Ok so this is how it went down. I was looking for a place to eat. I spotted Kosmos ordered the asada burrito in the drive thru not expecting much, but.... it was delicious! Went back the next day and ordered the chicken salad with Greek dressing, that was delicious too. They have a few other things on the menu so I'll be heading over next week. read more

Ouch! A 3!? This place is a gem! I think their food is great. Plus, the staff is always happy to answer any questions I might have. My only suggestion is that you don't eat here if you have somewhere important to go to right after. Let me explain, you will have an explosion of flavors hit your taste buds. That will be so overwhelming that you will be overcome by strong emotions. You won't be swinging off a swing, but you'll be crying. You're eyes will get all watery and puffy and you'll just have to accept that it's that damn good. Ugly-cry mode. I eat my food at home. It's flippin' good! read more

The staff was extremely nice. My chicken burrito was on point! Thank you for a great experience.

Kosmos Burger is one of those Gems for the locals. It been around long enough to mmow what we, locals, like and how we like it. It's a "must do" when visiting the area. Highly recommended. read more

A busy little corner we just discovered. The food is fresh, hot and yummy! Our favorite place for breakfast Try the veggie omelet with hash browns, comes with toast! A super value. Unlimited refresh cafe you serve yourself read more

Kosmos Burgers II - Serve yourself coffee bar! - Burgers Near Me - San Dimas, California

We were out for a Sunday Drive on Old Route 66 (Foothill Boulevard) and got hungry. We decided to stop at Kosmos Burgers for dinner. The service was friendly, the food came out fast and hot. My husband and son both wanted to sit outside, we had a gorgeous view of the tawny hills and oaks of San Dimas from our picnic table at sunset which seemed like the ultimate in California living. The burgers were good too. read more

I've been here many years ago before and I thought the food was really good especially their bacon avocado cheeseburger so I decided to give it another shot. My son and I ordered a colossal which is a pastrami and cheeseburger pretty much all in one with french fries and I got myself a double chili cheeseburger which is absolutely amazing. The service was really good I didn't know that they actually bring the food to your table and they have tons of condiments to choose from the staff was really friendly and it was pretty much kind of like a diner fill which I liked it the ambiance was great so the service ambiance and food were excellent and I would definitely be back. read more

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I went got the wrong drinks my shake was watery and they don't take gift cards but don't have that displayed this was the worst experience nothing There was a hair in the ranch. read more

Food is Excellent Service is with a smile and pleasant. Ambiance is the way it used to be good service, great food & a old time feel. read more

Kosmos Burgers II - Burgers Near Me - San Dimas, California

We literally are here every week. That should say something! The food is good sized portions and always so fresh. The staff is really friendly and sweet. Only con: the bathrooms need to be updated. read more

I would go lower if I could on food only !!! Worst chili cheese fries! Chili tasted old more like a spaghetti meat sauce ,way over salted , thin fries just don't pair well with chili cheese fries. The workers were nice !!! And it did not take long. Spent close to $11 just to throw them in the trash !!!! read more

Not a perfect experience, but service and attitude was great. I get the feeling they are really trying to improve things.

Been there ate that char-broiled chicken to dry seems like the chicken's been sitting for a while or not too good french fries the short shortening for the fries whatever oil they use doesn't compliment the fry it was in it that good of a Char-Broil chicken sandwich and had some weird seasoning read more

Lately we've rediscovered Kosmo's Burgers, the people are efficient and friendly, the food is excellent, I particularly enjoyed the fried zucchini, my son loves the breakfast burritos. The drive-thru menu shows no prices, and they didn't have a paper one for me to have for next time when I asked read more

Busy but plenty of seating. Parking was easy today. Lobby could have used a sweeping. A couple of tables were dirty but not for long. A staff member came out to clean as I was typing and cleaned them and the counter area. Even though their prices have gone up (like everywhere else), it's still cheaper than a regular restaurant. I decided to sit in the lobby. My breakfast (French Toast Breakfast) was served quickly and tasted great. The staff definitely have improved since covid times. Now, they appear to have found people who really want to work. It was busy today at 11:00 am. The staff was friendly and courteous to everyone who came in. I look forward to coming back. read more

Kosmos Burgers II - French toast breakfast. - Burgers Near Me - San Dimas, California

Ordered a burger with no onions in the drive through. Drive home to discover the burger has plenty of onions. No big deal right? Let me call and they'll make it right. I'm sure they'll comp the burger next time I'm there ... Wrong. They want me to come back immediately the same day or the next day with the burger that has one bite, other wise they cannot help. This is even though the person taking the order acknowledges that she made the error. We get burgers from here not because they're good but because they're kinda close. This place has mediocre food, they randomly close for no reason, and now I have to deal with bad policy from the owners ... I'll make the drive to Glendora for a better burger and better customer service next time. read more

Clean dining area and restrooms. Food is served hot and in large portions. They offer a discount if you pay in cash. They offer a good selection of foods. The malts are thick and satisfying. Breakfast is served all day. Staff is friendly and efficient. The drive-up window service is often busy, but it moves along nicely. It's worth a try. My husband and I keep going back. The fish & chips dinner is filling and is a complete meal. read more

Did I piss off the cook? Dude "forgets" bacon on a bacon cheeseburger 8 times out of 10. Came here for years, like a bad relationship. Smiled when he did it today. Last time. read more

The place may not be the prettiest, but I'm glad I made the stop! The service was very inviting and friendly, felt like a real kind local place. The food was also very good, definitely get a milkshake with your food! I will say, it was more expensive than I was expecting. I spent around $14 for a burger combo that came with burger, fries, and a shake (up charge). Not a terrible price now a days, but definitely more than I thought this place would cost. Overall very good, just don't go expecting it to be dirt cheap! read more

Was so excited to try this small business with so much charm but the girl with the black and green straight hair ruined the whole thing. Horrible service I ordered with a nice Hispanic girl and in my order I had bbq sauce I didn't get it so I went back to ask for my sauce when the green hair girl with mental issues started yelling at me saying it was 50cent. Hope the 50 cents is worth customers never coming here again read more

Oh my goodness?! I have been wanting to go here forever! So glad, I did. There burgers were amazing, avocado ripen to perfection, patties were fresh (tasted amazing) the baklava was out of this world... the people behind the counter were amazing host and workers. I would love to go here again and try their other selection of foods... worth the wait and in the nice quiet part of town with indoor and outdoor seating... read more

The ladies at the register are very friendly. It's a nice hamburger joint. Their place are great and affordable. Their salsa is very tasty. They deliver your food to your table with a smile. The food is good too. And they serve ice cream but haven't tried it yet read more

Man what happened to this place Kosmos used to be the go to spot for everything ..so what happened to the food went from an A+ to a D and the service especially today the lady in the pink jacket gave me the wrong order twice than charged me more the first price was 31 for a pastrami and onion ring than my order my right order was 33 for a sandwich and a burger that were not the best man this suck cuz this place is liked by so many people the food and service sucks now ill never go hear again read more

Kosmo's is always understaffed and has apparently lowered their standards on new hires, including management. I went through Kosmo's drive through today and Deena, the cashier, did not return my debit card. I realized it as i was driving away and went back, and she said she didn't have it and for me to check my car. I double and triple checked and do not have it. About an hour later i called to ask if they found it. Daisy, the manager said the cashier returned it to me. I asked if i can see the video footage showing the card being returned to me and she asked "why do you need to see it?"and HUNG UP ON ME. Unbelievably rude and unprofessional. That explains the horrible service they provide. read more

Service was great, such nice people. I come for the fried zucchini and the ranch which I put on everything here. read more

Kosmos Burgers II - Fried Zucchini - Burgers Near Me - San Dimas, California

Nice staff, but the food is sooooo BLAND it's disgusting tbh no seasoning at all on any of the food not even the fries have salt If you don't have a taste palette then eat here, if you actually want to taste the food then GO SOMEWHERE ELSE read more

I haven't been here since I was a kid, and that's saying something, because I have lived in La Verne since I was in 5th grade, and I pass by this place like every day. Let me say this, they have done absolutely nothing in the past 25 years to renovate this place like everything is exactly the same. Anyway I brought my kids here for some pancakes in the morning. The pancakes were actually pretty good and for 3 decent sized pancakes that fed my two kids and myself it costed under $6. But they charged me 3.99 plus tax so basically almost $5 for a packaged chocolate milk I don't know I can't see how they justify raping their customers like that especially since they have no upkeep cost that is going into renovations read more

I love the fried zucchini! I keep coming back. It's not too big like farmer boys. And the breading stays on. It is definitely not frozen. A+. Chili fries are meh. Chili isn't tasty but very salty. Pass on that. Greek burger is good. Would be so much better with some feta cheese or a yogurt sauce. The meat is tasty. I would devour order it again. The Kosmo Burger is okay. I would order it again. The burger deal can be upgraded with zucchini fries, that is a must. Oh, had lots of leftovers. The portions are good size. I would definitely split it with someone next time. read more

I use to love this place but now the prices have doubled! And they want to charge 50 cents to run my card?! you're lucky to be in business with these outrageous prices. I can get a better deal at Chili's Bring down prices or make better quality food. read more

Never disappoints... Whatever I have ordered has been delicious... plenty food on your plate. Also, employees are courteous

Do yourself a favor. Go elsewhere. Employees are kurt and almost rude. The food is not good or worth your cash. If you sit outside, you will notice a strong sewer smell to make the food worse if thats possible. Why the sewer smell on a dining patio? Well they put the tables just a few feet from a man hole sewer grate that is near the west entrance to this place. Odd place for a city necessity. read more

I use to come here often, never understood why they don't post their prices on the Menu Board?? Visited last night and they had a paper menu taped to the intercom. I ordered 1 hamburger, 1 carna asada burrito and zucchini fries. The paper menu said $3.49 for zucchini fries. As soon as I reached the window to pay I asked the lady if the prices on the menu were current/correct? She replied yes. I was charged a ridiculous $5.99 for zucchini fries, not to mention the quantity, quality and taste has diminished tremendously. The burgers are not as great as they use to be, and the $11 carne asada burrito is full of more beans than meat, and not worth the price for its quality or size. I wasted $23 on dinner. I should have followed my first mind and went to In-N-Out burger for better taste and quality. This is my last visit to Kosmos Burgers. They need to renovate the location, food, cook and entire restaurant. The restaurants interior needs a facelift. HIGHLY NOT RECOMMENDED FOR PRICE, QUALITY & TASTE. read more

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Update (July 3, 2024): On top of Kosmos being greedy and gougey with the prices ($10+ for the Zucchini fries, which are now "logs" instead of crispy "fries", and you get about 10 of them, which means they are $1 log), they charge a credit card fee of .45 or .50 cents for each credit card transaction. There are only 10 states in the US where this is illegal -- and CA is one of them. When an establishment does this, it angers the credit card companies because imposing such a fee compels the consumer to use alternate means for payment, which means those credit card companies DO NOT get their fees from the consumer's credit card transaction. I have reported this to both Mastercard and Visa and they will take the appropriate action. You are a business establishment that has opted in for making the use of credit card transactions available to the consumer, so you are obviously trying to offset your merchant fees (that you opted in for) by charging a fee per transaction to the consumer. Absolutely shameful. Unfortunately, as a result of my reporting this, Kosmos will most likely raise the cost of their menu items AGAIN in order to take even more money out of our wallets. I an sickened of restaurants taking advantage of these inflationary times and making the consumer pay the price. I will no longer be coming to Kosmos after decades of regular dining. read more

This is the best burger place I have ever been to in my entire life! Oh and the prices are reasonable too. I also had the zucchini and it was the best I can ever buy! read more