At Old Chicago Pizza in Petaluma, the Cheese Pull Is the Main Event

Petaluma’s Old Chicago Pizza has been serving deep-dish pies since 1978, piling on pounds of cheese and sliding into Instagram feeds for the ultimate cheese pulls.


Behold the cheese pull, social media darling and perennial muse to food stylists everywhere. Lately, it has taken on a near-theatrical life online, with slow-motion reels of molten mozzarella stretched to the limit, flirting with the laws of physics — and culinary decency. In Petaluma, Old Chicago Pizza has become one of Sonoma County’s most enthusiastic enablers of the #cheesepull form.

It’s not hard to see why. Start with a deep-dish pie layered with roughly two pounds of cheese, then bake it for 30 minutes or more until it bubbles and blisters into submission. Joanne Hansen, who owns the restaurant with Audrey Haglund, isn’t about to tinker with a tried-and-true recipe they inherited from the original proprietor, Bill Berliner, known locally as “Chicago Bill.”

“We’re not skimpy on the ingredients,” Hansen said.

Old Chicago Pizza is among the county’s longest-running pizzerias — younger only than Mary’s Pizza Shack, founded in 1959, and Petaluma’s Pinky’s Pizza, which opened a year later. When he founded the restaurant in 1978, Berliner brought his version of deep-dish west, introducing locals to the thick flaky crust, straightforward tomato sauce and generous layer of mozzarella that define the Windy City’s signature pie.

Owners of Old Chicago Pizza in Petaluma
From left, Old Chicago Pizza owners Joanne Hansen and Audrey Haglund on Thursday, March 19, 2026 in Petaluma. After founder Bill Berliner died in 2009, Hansen’s husband, Michael, and longtime employee Haglund took over. Joanne Hansen stepped in to help run the pizza restaurant after her husband died in 2016. (John Burgess / The Press Democrat)
A customer pulls a slice from a deep-dish pizza pie at Old Chicago Pizza
Concho Padilla creates a waterfall of cheese while trying to separate a slice of a gooey, stringy deep-dish pizza at a family birthday at Old Chicago Pizza Thursday, March 19, 2026 in Petaluma. (John Burgess / The Press Democrat)

Not much has changed in nearly 50 years. Inside the historic Lan Mart Building, generations of Petalumans have sat beneath the same glass chandelier, along the same exposed brick walls and at the same slightly sticky wooden tables, eating the pizzas they grew up with.

The heaviest pizza ever made here, Hansen said, tipped the scales at 8 pounds, though most large pies land in the 4- to 5-pound range before toppings. Add 2 pounds of cheese, and you’ve got something that weighs about as much as a newborn. Serving yourself isn’t advised — the pizzas are heavy and arrive piping hot — and staff will happily step in, offering both a hand and a front-row seat to that gravity-defying pull.

“It takes a certain amount of practice to serve it,” Hansen said.

There’s an art to eating it, too. Resist the rookie mistake of diving straight into those golden, bubbling pockets of cheese. A little patience goes a long way — your mouth will thank you later.

Salad at Old Chicago Pizza
The Lisa Iskin Salad with tomatoes, green pepper, mushrooms, chopped olives and topped with cheese from Old Chicago Pizza in Petaluma Thursday, March 19, 2026. (John Burgess / The Press Democrat)
People dine at Old Chicago Pizza
Serving up a variety of large deep-dish pizzas, plus a tiny individual one, for a hungry table at Old Chicago Pizza Thursday, March 19, 2026 in Petaluma. (John Burgess / The Press Democrat)

The menu

Pizza, pizza and more pizza. Deep-dish crust is the signature, but the double crust — two layers of crust surrounded by cheese and sauce — is also a favorite. Loading a deep dish with too many toppings isn’t recommended; things can quickly become overwhelming. Thin, extra-thin and gluten-free crusts are also available, along with garlic bread, simple salads, warm cookies and mini cheesecakes.

Most ordered

Pepperoni deep dish.

Fun fact

The 150-year-old building has seen its share of lives. According to local lore, it once operated as a brothel, a saloon and a hotel. Its twists and turns — with businesses tucked behind dozens of doors — invite curiosity. Whether it’s haunted is up for debate, though few dismiss the possibility outright.

Entrance to Old Chicago Pizza in Petaluma
Old Chicago Pizza opened in 1979 upstairs in the Lan Mart building. Photo taken Thursday, March 19, 2026 in Petaluma. (John Burgess / The Press Democrat)
Slice of pizza
The scratches from over 40 years of pizza cutters leave a work of art on the steel deep dish pans at Old Chicago Pizza Thursday, March 19, 2026 in Petaluma. (John Burgess / The Press Democrat)

The backstory

Berliner, brother of Andy Berliner, the co-founder of Amy’s Kitchen, set out to create a West Coast counterpart to Chicago destinations like Gino’s East, Giordano’s and Pizzeria Uno. He developed his own crust recipe — still a closely guarded secret — and built a loyal following. After Berliner died in 2009, Joanne Hansen’s husband, Michael, and longtime employee Audrey Haglund took over. When Michael Hansen died in 2016, Joanne Hansen stepped in, continuing the tradition.

The price

A medium deep dish (six slices) with cheese is $29.50; a large is $38; a small is $22.40; and a mini is $8. Additional toppings cost extra. A medium double-crust pizza with cheese is $35 and includes two toppings.

Mini pizzas with a variety of toppings from Old Chicago Pizza in Petaluma. Photo taken Thursday, March 19, 2026. (John Burgess/The Press Democrat)
Mini pizzas with a variety of toppings from Old Chicago Pizza in Petaluma. Photo taken Thursday, March 19, 2026. (John Burgess / The Press Democrat)

The spot

41 Petaluma Blvd. N., Petaluma; 707-763-3897; oldchgo.com. A second location at 1390 N. McDowell Blvd., Suite H, offers delivery and pickup.