Classic Smash Burgers in Boston

Burgers, Fries & Shakes in Downtown Boston

Stop by Big Grin for no-nonsense smash burgers in Boston. Located inside the Winthrop Center, we serve up American-inspired roadside classics with a contemporary twist. Whether you're chasing that classic double with crispy edges or perfectly salted fries and a shake, Big Grin brings big flavor every single time.

Our menu keeps it simple with our signature 3.5 oz patties, smashed to perfection and served with tallow onions, ripe tomato, Patriot pickles, classic American cheese, and Grin Sauce on an herb-toasted potato bun. They’re burgers that bring the grin.

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Our story

Big Grin was born from Michelin-starred Chef John Fraser’s vision to reimagine classic American comfort food with a contemporary touch. His approach emphasizes quality sourcing, refined technique, and nostalgic simplicity that brings a thoughtful and unexpected twist to the beloved smash burger formula.

With a short and simple no-frills menu and a dedication to doing one thing, really, really well, Big Grin is one of those classic Boston hamburger places you’ll find yourself coming back to again and again.

Smash Burgers Done Right

We don’t mess with burger fundamentals—we just make them better. All of our burgers are made with 100% Black Angus patties and stacked with top-shelf ingredients for a crispy, juicy, and unforgettable bite. Here’s what you can expect at Big Grin:

Smashed 3.5 oz beef patties
Signature house sauce
American cheese melted to perfection
High-quality toppings like tomato and tallow onions
Soft and golden potato rolls
Crispy crinkle-cut fries
Shakes, soft serves, and sweets

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Fan Favorites

What makes us the go-to Boston burger? Our menu may be small, but every item is a heavy hitter. Here are some of the favorites that keep a big grin on our customers’ faces:

Big Grin Burger - Smashed 100% Black Angus patty, beefsteak tomato, Patriot pickles, melted tallow onions, classic American cheese, and Grin Sauce on an herb-toasted potato bun.
Big Bacon Burger - Two smashed patties, bourbon-glazed onions, American cheese, and maple–black-pepper candied bacon for a sweet-and-savory bite.
Organic Grilled Chicken Sandwich - Swiss cheese, basil pesto, Patriot pickles, and tomato for a fresh twist on a popular classic.
Crinkle Cut Fries - Extra crispy and extra golden.
Shakes & Sweets - Soft serve, creamy shakes, and nostalgic floats done right.

We’re also conveniently located inside The Lineup at Winthrop Center. Whether you’re grabbing a quick lunch downtown, picking up a quick meal on your way home, or treating yourself after work, Chika serves up comfort food in the heart of the city.

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Fried chicken stacked up with melted cheese dripping on top

“The lamb leg chermoula pita pocket from Iris Mezze was honestly the best pita I've ever had! The lamb leg was super juicy, flavorful and crispy. The margherita pizza from Gatto's was also much better than expected — the mozzarella was super fresh and the sourdough wasn't too heavy to slow me down for the rest of the day. The staff is all very accommodating and the interior is beautiful and kept very clean. 10/10 would recommend for lunch in the financial district”

Devon F

“Great spot! I get lunch here several times a week and haven't had a bad experience once. Great food at a reasonable price for the quality.”

Michael B

“Great food at a reasonable price. Beautiful interior.”

Chae K

Why Choose Big Grin?

What makes us one of the best burger establishments in Boston? Michelin-starred Chef John Fraser created Big Grin to combine bold flavor, premium ingredients, and American nostalgia. Each burger is smashed to order, cooked on a flat-top, and served with perfectly balanced toppings.

Located in The Connector at Winthrop Center, we’re not your average burger bar in Boston. You’ll find a modern, open space with communal seating and plenty of lighting. Whether you work in the area or you’re visiting Boston on vacation, Big Grin is the perfect place to satisfy that burger craving.

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Pickup, Delivery & Catering

When you’re in downtown Boston, hamburger happiness is only a couple of clicks away. Place your order online or contact us to learn more about catering.

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Hours & Location

We’re conveniently located in downtown Boston, with plenty of parking options and T stations nearby.

Hours

Monday – Friday

11:00AM – 3:00PM

Location

115 Federal St. Boston, MA 02101

Located in the Winthrop Center

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Connect With Us

Check us out on social to learn about new menu items, specials, and behind-the-scenes burger artistry.

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Frequently asked questions

Are your burgers made to order? −

Absolutely. Every single patty is smashed to order on our flat-top griddle to ensure a crisp, juicy patty with just the right flavors and textures.

Do you offer non-beef options? +

Just because you go to a Boston hamburger restaurant doesn’t mean you have to eat beef! We have an Organic Grilled Chicken Sandwich with beefsteak tomato, Swiss cheese, basil pesto, and Patriot pickles—perfect for those seeking alternatives to beef. Plus, we often have seasonal specials, so make sure to check out our menu.

Do you serve kids? +

Absolutely! Our Boston burgers and shakes are a hit with kids and parents alike.

Do you deliver? +

You bet! We deliver the best burgers in Boston straight to your doorstep. Order delivery today!

Do I need to reserve a table? +

We’re a casual restaurant open to the public. Our dining style is first-come, first-served, so stop by whenever you’re hungry!

What’s the seating like? +

With lots of communal seating in a food hall-style space, we’re one of the most spacious burger places in Boston. From solo diners to big groups—we’ve got you covered!

Can I visit the other kiosks in The Lineup? +

Absolutely! Come try a selection of food from talented chefs. Check out The Lineup kiosks to learn more.

Closeup image of hamburgers, french fries and dipping sauces