I'm not going to lie, the size of this burger was pitiful for nearly $16, but it is hands down the best burger I've had in Tucson to date and size aside, it has everything you want in a good burger. Let's quickly go over what makes an excellent burger. 1. Juicy 2. Thick patties 3. Well seasoned Bos Burger most certainly had all three. Very well done burger. I had the fried onion burger which is just their slightly fancier name for a cheeseburger with grilled onions. Great stuff though. Service was acceptable, nothing to shout about it, although my order took over 20 minutes, part of the reason I'm only giving 4 stars. If they had a little more burger in there, it would have 5 stars though. read more

So good my dad made me go buy him one! I've been sharing a lot of local places with my parents and they always end up asking how to get there. Wagyu burgers?! So amazingly delicious and cooked to perfection. My dad and I loved the crispness of the patty and the freshness of the ingredients. This is our new favorite father-daughter spot to grab a burger! read more

-- Great Vibes, Cold Burgers I really wanted to love this place. Their social media game is top‑tier -- fun, clever, and honestly the reason we decided to stop in. The ambiance matches the online hype perfectly: MSA Annex's trendy décor and a open space make it feel that like it should deliver an amazing meal. But after paying over $50 for two burgers, two fries, and two cokes, the experience fell apart. We waited a solid 30 minutes for our food, which would've been fine if it came out fresh. Instead, everything arrived cold -- not lukewarm, not "cooled off on the walk from the counter," but genuinely cold. The frustrating part is that the flavor was actually good, so you can tell the recipe is there. The execution just wasn't. If this place could match its service and food temperature to its marketing and atmosphere, it would be an easy five stars. For now, though, it's all sizzle online and no heat on the plate. read more

Soft serve swirl ice cream is absolutely delicious. Very friendly staff but outside eating only. read more

Bos Burger - Outside - Burgers Near Me - Tucson, Arizona

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Had dinner here Friday night and ended up waiting a bit due to a larger order they received I guess right when we got there. During this time, they stopped taking orders. So we sat down to give it 10 minutes, but saw a line quickly forming so then ended up in the back of the line with probably 6 parties in front of us... I do wish there was a better system for this. They also have some both seating which was full and some patio and high top counter seating right in front of them for dining. The me you is pretty small so it makes it pretty easy to find what you'd like! We got the onion burger and the green chile burger, both with fries. They were pretty good and the green chile one had a kick to it! The fries were thin and crispy and salty to the taste (but not too salty) so I liked them too! This place is definitely worth a visit if you're at the Annex! read more

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Darn good burger. I had the special which was a spicy Serrano burger and my dining mate had the green chile burger with fries. We both devoured our burgers! We both got singles but if you are hungry- go for the double ... or maybe triple. Of note, fries are a separate cost. This is an order at the counter place as is every restaurant at the MSA annex. Outdoor seating but there are shaded and roofed spots around. For a Saturday evening, service was quick... about 10min and they give you a time estimate which is cool in case you wanted to explore the annex. Parking can be tricky depending on the day/time and it's paid parking M-S till 7pm... fortunately Tucson's parking fees are pretty low compared to several cities I've been at. So glad to have a local and solid burger joint on the Westside! read more

Bos Burger - Burgers Near Me - Tucson, Arizona

We stopped by on a Monday night and they were short handed. The cook was also the cashier and he apologized for the wait. Our burger took about 20-25 minutes. We had the classic, fried onion, and green chili burgers. The overall favorite burger was the onion burger. It was juicy with plenty of grilled onion. The fries were ok, a little soggy but not hot. We had no trouble getting a covered table. read more

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Wow! Excellent burger! We love the MSA Annex, and Bos burger is a nice addition to the selection of eating establishments here. It's dog friendly and just a lovely place to spend the day or evening. I waited at the window for a while but once they arrived the guy taking the order was very nice. The food took about 20 mins but it was well worth it. The prices were on par with the quality, the katsu Sandi was so good too! We will be back! read more

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I heard about this place a few weeks ago and was excited to see a great restaurant open where Beaut Burger used to be. Tonight, I ordered the Double Green Chile Burger, which comes with American cheese. As a New Mexican, I appreciate that they spelled chile correctly, referring to the pepper, not the soupy dish! I asked about the portion sizes: a single is about 3 oz of American Wagyu, and a double is 6 oz. I went with the double because I was hungry. The burger was amazing. I'm usually skeptical of Wagyu burgers since the magic of Wagyu is in its marbling, but this one works beautifully. The textures of the burger and toppings come together perfectly for an incredible bite. At $16, it's not a cheap burger, but given how expensive beef is right now, it's absolutely worth it. If you're craving a top-tier burger, definitely eat here. I was told 20 minutes for a wait, but it came out in about 10 minutes. The service was fast and friendly. The place is quaint with the other businesses of MSA Annex. read more

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They totally nailed it!! Great burger and fries!! I will go here often I can already tell. Some of the best fries super -super fresh and hot made for each order. Burgers! Burgers with cheese, burgers with green hatch chile, and burgers with fried onion. They also have a Japanese style I imagine Katsu style pork. Can't wait to try that next time. You can order one or two patties. I recommend getting 2. About $11.50 for the double burger. Yum yum read more

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Really sad to say this - the past two times we've come back the food has been really inconsistent. The wait times were between 30-40 min and we watched several people in line waiting to order leave. I feel like there's not enough staff working during their busiest times! I don't think two people handling cooking and taking orders for a line of people that doesn't stop is enough! I don't want to come back until I see more positive reviews from people I trust! read more

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Been here a few times, love the burgers! And the sweet potato fries are excellent. The location is very vibrant & always a fun time.

Showed up to Bos Burger at around 8:20pm on a weeknight to try it for our first time. Went to the window to order and the girl working there was counting cash and ignoring us. We finally got her attention and she opened the window, looking confused as to why we were there. We asked if we could order and she said "uhhhhh ......... we're closing". We responded and asked why, since they're supposed to be open till 9pm. She said that they're closing early because it "was slow". We mentioned that we drove about 25 minutes+ to get there and she just gave us a blank stare. Not sure why a brand new business would turn away new customers but being bad at running a resturant seems to be a common theme here in Tucson. Their yelp is currently sitting at a 3.7 during their first month of business. You'd think the owners/managers would be a bit more concerned and maybe stick around to make sure their new restaurant is running properly, but like a lot of these new smash burger places, the owners probably have 10 other businesses and run them similar to how Logan Paul runs his ;) Lost a customer bro! read more

Bos Burger - "Uhhhh ...... we're closing cuz it's slow" (8:20pm when they close at 9) - Burgers Near Me - Tucson, Arizona

I'm. From Okla. home of the onion burger. Happy to say this place hits home. Love it. read more

Bos Burger - Dbl onion burger. - Burgers Near Me - Tucson, Arizona

Still miss the old spot that used to be here..was genuinely bummed when it closed. But BOS Burger at the M.S.A. Annex? They've more than earned this space. Everything here is on point. No half-assed menu filler. The burger is straight fire & juicy, packed with flavor, cooked exactly how I wanted it. You can tell these people actually give a damn about the food. The best part though is the whole setup. You're not just grabbing a quick bite...you're at the Annex. Wander around, poke into other spots, chill for a minute. Turns a basic burger run into something way more fun. Walked in still missing the old joint, walked out 100% sold. BOS Burger is the real deal. read more

Driving back to California after visiting my grandson in Tucson. My go to is westbound. For some reason on Sunday, the Mexican restaurant was closed so I decided to stop at Boss Burger. Burgers were great, but when I went to pick up the order, the staff was rude. Seemed like he didn't want to work there. I'll 56 years old come on give me a break next time. I'll just get a tall can and a hotdog at Mavericks and be on my way. Do better. read more

Bos Burger - Two Burgers. Staff was rude. - Burgers Near Me - Tucson, Arizona

Spent $24 on a Double Classic Fries and a Water. In my opinion that wouldn't be unreasonable for a decent lunch though a bit on the high side. Unfortunately the burger was very salty and had some other flavor I couldn't place. That other flavor was not good. Not inedible but not good. The patty also seemed overdone, even for a Smashburger style. The fries mostly seemed fine. This isn't 5guys, the fries portion was about a McDonald's medium. I'm torn whether I would return. Maybe it was a one off ‍ read more

Shut down early because they got to busy. Reason, only 2 workers. Being busy is good business. Saw the cook drinking whiskey and taking food to the other restaurant in the anex. read more

Weather was gorgeous so we decided to try BOS Burger. Friendly staff, will text your phone when order ready. We ordered the double green chili smash burger and sweet potato fries. We enjoyed it all. Because they're smashed patties- recommend a double or triple. Grabbed a drink from the bar across the way and had ourselves a lunch date! We'll be back. read more

Burgers are extremely salty, with salt being the predominant flavor (got the classic with 2 patties). The bun disintegrated immediately and everything inside smooshed out. Fries are just okay and portion size was small. The .50 serving of extra sauce was absurdly small, and forgotten by staff. $24 including tip for a smallish salty overdone disc of beef on a disappearing bun that made it so it all had to be slopped up with my fingers, accompanied by a few fries, is wayyyy too much $$. Even for less $$, it's still not good. (Sadly) Just no. read more