Welcome to Mullen's Dairy

From our family - To yours.

About Us

Our roots run deep in Wisconsin.

Founded by dairy farmer Frank Mullen Sr. and his sons, Frank Jr. (Moon), Weber and Gerry, Mullens began as a brick and mortar operation where the Mullen’s bottled their milk and sold a variety of dairy products including milk, butter and cream. By the ’40s, the three brothers added ice cream production to the mix.

Mullen’s is known for its creamy and delicious ice cream. It sells small batch homemade ice cream in retail outlets throughout Wisconsin and is more than happy to scoop it up for you in the shops. Today it’s owned by three brothers from Oconomowoc: Josh, Matt, and Adam Keepman

Visit our community page.

A tradition in the making.

In 2016, three brothers made the fateful decision to keep the legacy of an 85-year-old business alive. But the Keepmans are just one of many families with memories tied to Mullen’s Dairy Bar, the iconic ice cream shop and diner that has roots dating back to 1932.

Mullens frozen tradition

Our Mullen's Fans Speak!

As authentic as an old school diner can be. The vanilla malt was absolutely one of the best I have ever had, and my dining companions loved their cookies and cream shake
Jeff D
Will eat there with my family as a tradition. We have all of 12 years now. Food is great Service is Cool, place is homey and cheerful. Enjoy it a lot.
Veronica S
What a gem! We frequently travel to small towns around Wisconsin just to try little spots like this. Mullens is by far one of the best we've been to.
Brandi M
The ice cream was even better than I remembered. The service was topnotch. I will return again just hopefully sooner. Trust me if you're ever in Watertown and love ice cream this is the place for you.
Karl D.
I've eaten a lot of ice cream in my life and this place has the best!
Barb Merrill

212 W Main St, Watertown, WI 53094

Monday Closed
Tuesday 11AM - 8PM
Wednesday 11AM - 8PM
Thursday 11AM - 8PM
Friday 11AM - 9PM
Saturday 11AM - 9PM
Sunday 11AM - 8PM
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