Donuts are to die for. Can get super crowded on the weekends but it's worth the wait. Their coffee needs help though, it was not good at all. Staff is friendly. Enjoy!!! read more

we got 6 of their most unique (and expensive $3.50 per donut) flavors and only the maple bacon was a really good one. would not return but worth stopping by if you are in the neighborhood and just want one donut and coffee. read more

AMAZING. Go here. Now. Vanilla bean donut is incredible. Friendly staff. Delicious donuts. Freshly baked. Been here multiple times with zero disappointments. read more

Creative donuts, but they were too sweet for me. I tried the Vietnamese coffee donut and maple bacon donut. I couldn't really taste the coffee flavor in the donut. Just tasted like a glazed donut to me. Very soft and moist, but I wasn't amazed by them. read more

best. donuts. ever. and i say that having only tried a few flavors at various farmer's markets (i took my husband to the cambridge winter market specifically for the donuts). i can only imagine how much more dangerous it would be to go to the store. :) read more

4.5 stars. This donuts are great! I loved the brown sugar hazelnut the best. Not cheap but great quality - long lines on weekends. Also tried the raspberry jam which was very good and the honey dipped. read more

Best donuts in the city! Come early for the best selection (and be prepared to wait with a few other early risers).

Best donuts I've ever had, hands down. Their flavors are original, the donuts are soft and rich with flavor, and its impossible to buy only 1. Sure they're expensive but they're big in size and quite filling. read more

Alright, so I'm giving this place 3 stars. I'm going to preface this with the fact that I think the product is fantastic....for the most part. And by that, I mean that I think the cake donuts need work. Sure: they may not be the draw, but a good doughnut shop needs, NEEDS, a good cake doughnut (classic? blueberry cake, or cake w/ chocolate frosting. Might I add, the regular chocolate frosted is way too rich, and this is coming from a guy who can't get enough sweet, as it is). But my real gripe is the fact that this place has gained phenomenal popularity without upping the supply that its demand necessitates. You simply need to up your capability for taking on the large volume of customers. Yep. I'm taking the business consultant standpoint in this review. And the tough love that's about to ensue really is because I do enjoy the product and, so far, the people who work there. Let's start with the fact that the hours are listed as until 3 PM until Saturday, and maybe Sunday, if I remember correctly. You've been here, right? How often are they sold out before 1 PM? Most weekends, I'd venture a guess. You've been open for long enough now that you should accommodate for that fact. Anything else, you still close at 1 PM but you increase your capacity to take customers. I hate to sound insufferable, but I shouldn't have to wait 20 minutes or more for a doughnut or two on a Saturday morning at 9:30. If you had more than one register and one person taking orders, I think handling a higher customer turnaround rate would be completely feasible. And, in all honesty, I don't think that request is all that ridiculous. Let's not forget that some people do, in fact, order 1 or 2 donuts, and others flounder about as they try to fill one of your boxes. For those of us who'd just like to get our coffee and doughnut or two and sit down to read, or just leave, that's incredibly frustrating. Never forget that you are not only in the food service, but in the customer service business. I have other suggestions, but there are two rules for success: 1, never tell anyone everything you know. I'll be coming back, don't you worry, but goddamn if I'm not going to try to find the non-peak hour that not only satisfies my doughnut craving, but also serves my hedonistic weekend ventures. Oh, you wanted a review of the doughnuts? Ok. Fine. I've had the vanilla frosted (can't stop wanting that one), the strawberry (tastes like REAL fruit!), the chocolate marble (see above, but if rich is what you're after, you're in for a bona-fide treat), the maple bacon, which lives up to the hype, the bourbon caramel, which, being a whiskey drinker, is more caramel than bourbon (not a complaint in this sweet tooth's mind), and several others. As said, the cake donuts do not have that moist, cakey feel of a classic doughnut shop's doughnuts, at least, to me, but if that's not what you're looking for, you're not going to be disappointed. Listen, I'm the kind of guy who can find something wrong with most things. But if you only look at what I dislike compared to what I DO like, you're missing the forest for the trees. This place is a gem. read more

"We went here for National Donut Day and were wowed by the taste of these donuts and by the interesting flavors. I especially liked the Brown Butter Hazelnut, Cherry Hibiscus, and the buttermilk cake donuts. Others in the group raved about the Maple Bacon and the chipotle chocolate. read more

The donuts are tasty. So food/flavor-wise I would have given them four stars, but all items are about double the cost of what they should be (~3 - 3.50 for a donut). It's like airport prices right at home in Union Square! Maybe hipsters with trust funds frequent this place. Their dough has that Cinnabon vibe which makes me think each donut is essentially a neutron star of lard and sugar. So great taste. Not the greatest value. read more

Totally underwhelmed by these doughnuts. I have been fine with the cost given the quality of other upscale donuts (Doughnut Plant NYC, Flour's vanilla cream filled, etc.) - USD felt like a waste of $20 for 6 donuts. We tried 6 flavors - the donuts were greasy and heavy/doughy and most lacked bold flavor. Brown butter hazelnut crunch was the best one. Strawberry glaze tasted okay though not like strawberry. Maple bacon needed more maple flavor - totally bland glaze! Chocolate frosted had a bitter chocolate glaze - a bit too bitter. Boston Cream with the same chocolate glaze was better given the sweet cream center, but I didn't love the gel-like filling texture and the vanilla (I could see vanilla bean specks) was masked by a sour note, perhaps lemon. Creamsicle was overly sweet and not orange-y enough. read more

Grabbed four donuts from the hay market stand. The vegan orange mango donut (which I ate immediately) was amazing. I loved the glaze and the texture of the donut. The other three, carrot cake, vanilla bean, and Vietnamese coffee were all mediocre. The carrot cake's texture was somewhat unappetizing. The vanilla and coffee donut both tasted like their flavor should have been nutmeg, because that's all I could taste... probably didn't help that they barely had any glaze left on them after all four being squished in the same bag together.... would get the orange mango one again. read more

Union Square provided the donuts for our wedding dessert. They prepared a huge variety in three different sizes and our guests couldn't stop raving about how delicious they were. Loved featuring a local business on our special day! read more

Good for Union Sq donuts! You charge $3+ for a single donut and the sheep of this world will think it's best thing since sliced bread but hey they got me for $12 read more

3 stars for the donut holes but everything other than that is horribly oily and super sweet. Definitely overpriced for average $3:50 a donut this quality. I wonder those who gave good rating never had a decent donut. read more

The absolute best donuts ever. Light and perfect. Very interesting flavors; chocolate chipotle and dulce de leche are delicious. I only hope they will start opening more than only half the week. Well worth waiting in line. read more

My wife, my son and his boyfriend went there on a Saturday morning. Not a good place to go if you are diabetic, like me, but OH MY GOD. I used up three days worth of carbs. Fresh, big, wonderful, delicious. Not enough positive words. Whole area is buzzing with neat little shops, but if you like donuts, life is not complete until you hit Union Square. read more

This place makes donuts out of this world. I had the maple bacon and butter hazelnut... and wow. They are so rich and dense I couldn't finish either. I tried though! Had the cold brew was disappointed in the size but taste was on point. The lines get long but move fairly fast so be patient. read more

I don't like donuts but I really like union square donuts. You might wonder, "why did she even try USD if she doesn't eat donuts?" It's because I like to explore and want to be proven wrong. I'm not opposed to donuts altogether. I came with a friend and got a Boston cream and their orange cardamom donut. The orange cardamom seriously won me over- the bread was SO light and springy and airy and let the modest layer of orange cardamom icing take front stage. I'll visit once again before I leave Cambridge and maybe try another flavor. read more

These donuts are to die for. The salted bourbon and maple bacon donuts are my favorite. So delicious with a hot coffee on a cold morning!

These donuts are amazing, melt in your mouth, freshly made goodness. Get there early!

get these in yer face right now. like. is there any better way to knock yourself into a food coma? the frosting, the sugar, the fillings, the bacon topped. yep yep yep, gonna sign the paperwork to commit myself to a civil partnership to the donuts asap. read more

This donuts will chance your life, and I don't even like donuts! They are so fresh and delicious. Get them for a meeting at work and everyone will love you. Or split two flavors and grab a latte at Bloc 22 across the street and sit outside in the warmer months. read more

Best donuts I have ever had. They sell out really quick though so you have to get there early. I tried the Vanilla bean and the sugar raise and it was fluffy and delicious. read more

The Boston cream and pina colada donuts are amazing. A lot of their other donuts lack a convincing flavor, but in these parts it's tough to beat Union Square Donuts. read more

Stumbled in here by accident since other breakfast places had a long line. Boy what find! We had the vegan plain, apple crisp, chocolate glaze and Boston creme. Absolutely fantastic. All of them were light, flavorful and not overly sweet. I know what you think all donuts are sweet, but they had a great balance of sugar, toppings and dough. Man, wish I had one right now, too bad we are 250 miles away! There teas a great too! read more

The doughnuts are good, but more times than not, they are sold out. Sometimes before you make it in the door, sometimes while you're standing in line. read more

When I envision a Simpson's doughnut (dohh NUTT?!) this is what I envision. The donuts at Union Square are absolutely amazing! I had actually had their maple bacon mashup a few years before at a Craft Beer festival, but was not sure if I it was that good, as I had a good amount of beers to drink. Anyways, my husband and I decided to head over to Union after picking up some Bagelsaurus bagels. I know I sound like a walking hipster foodie, but you guys have it made in the Cambridge/Somerville area. We walked in and decided to go for a half dozen doughnuts. What was really cool to see was the employees in the back making the doughnuts. FRESSHHHH! Knowing that we could not eat any of these delicious treats, I suggested that we get a bag of the doughnut holes. Well these are the best little morales of fried dough covered in icing that you will ever experience Be prepared to spend money. $$$. Had to make it rain a bit, but it was well worth it! read more

One of my first stops after moving into my new apartment in Somerville. After hearing much about the hype despite not ever being really enthralled with donuts, I was enthusiastic to try this place out. I was really impressed with the size and the texture of the donuts. I think texture is make or break for a good donut and that is why a good majority of places in the Boston area are generally weak. This place really had the perfect balance between sink your teeth in fluffiness and a slightly crispy outer texture. The flavor combinations are decadent, diverse and ever-changing. The maple bacon is pretty decent albeit overhyped. The bourbon caramel and toasted coconut are pretty amazing marvels. This is a must do for locals and certainly worth making a trip from other reaches of the greater Boston area. Cold brew coffee was pretty lackluster and a bit pricey for the small size. I will certainly return even if donuts aren't one of my favorite things. read more

It's such a tiny and adorable little shop that's always way crowded. It's not surprising because these donuts are insane. They are so soft and fluffy that it's sort of like when you imagined eating clouds as a child. There are so many delicious choices, that you'll notice everyone leaving with massive boxes of donuts. The brown butter hazelnut crunch, vanilla bean, and sea salted caramel are killer. Goooooo! read more

My boss bring those donuts for our group meeting. I was so surprised to see bacon on top of a donut the first time. It turned out very delicious with the combination of a piece of bacon and a donut. I love the coconut one too. The donut is not too sweet , which let you taste different flavor of the coating. Can't wait for our next meeting! read more

Best donuts I think I've ever had. I've eaten donuts at Dunkin, Honey Dew, Dippin Donuts, and Krispy Kreme, and these blow most of those away (except for Krispy Kreme, those are quite good). I tried a few, including jelly, raspberry, coconut, and maple bacon. All were delicious, but the maple bacon and raspberry stood out. They have actual chunks of bacon on it! Can't really beat that. These are, admittedly, a bit expensive ($2.50-$3.00 on average I think), but they are bigger than most and worth the extra dough ;) read more

There's been so much buzz about this place that I was excited to finally try it. I ordered the Brown Butter Hazelnut Crunch and the Toasted Coconut, and they were both underwhelming. Although light and fluffy, it was more doughy and greasy than I would prefer. Also, the flavor was okay, but it wasn't the 'best' or most tasty donut that I've encountered. I think the only thing that stands out about this place isn't their donut, but what they do with the oil: they recycle it and it gets turned into biodiesel. read more

Mmmm, hipster donuts & coffee ;-) Limited hours, flavours and seating is actually a good thing here - all done well. Start with the maple bacon. Baby friendly. read more

Maple bacon donut, brown butter hazelnut crunch donut=heaven. Huge donuts, friendly staff. It all makes me happy.

These are the best. donuts. ever. Go to Dunkin for coffee but come here for maple-bacon donut goodness that makes you feel like Homor Simpson or the lovely caramel sea salt donut, my favorite. Also they are not quite a tummy bomb since the donuts themselves are light and fried to perfection. Awesome. read more

Amazing donuts. Most are are a bit too sweet for my taste, but delicious in small doses. The cake or sugar donuts goes perfect with a cup of coffee. Always busy on the weekends, so make sure to get there early. read more

I don't really care much for donuts but these are DELICIOUS! The maple bacon is good, but a little intense and brown butter hazelnut crunch is really good, but the vanilla bean is my absolute favorite. read more

Union Square Donuts deserves the reputation and business that they have. I was late to the game because I never wanted to wait in the line. Now I've tried many of their flavors and I've enjoyed them all but the brown butter hazelnut is perfect. I like doughy donuts- I'm not a fan of the Krispy Kreme style sugar bomb and Union Square manages to make a soft donut that isn't too bready with a combo of interesting flavors. read more