UW-Madison: ‘Magic’ plus UW science equals world-champ cheese

CONTACT: Alan Hamann,

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MADISON – Wisconsin cheese is at least as old as the state. The University of Wisconsin-Madison has one of the world’s great institutions of dairy food science, the Center for Dairy Research.

And yet when milk is converted into cheese, science only takes you so far, says Tom Dahmen, a second-generation cheesemaker who directs the Chula Vista cheese factory near Browntown, in southwestern Wisconsin.

“I’m a big believer in heavy-duty science, but there is always a bit of magic in making cheese,” says Dahmen, who began washing cheesecloths at age 6. “The rest is intuition, experience, even black magic.”

At Chula Vista, those ingredients are combined to produce a string cheese called Oaxaca. In March, Oaxaca (wa-HA-ka) received the Best in Class award in the Hispanic melting cheese category at the 2016 World Championship Cheese Contest in Madison. The center helped the company create the cheese.

Oaxaca is a white, mild-flavored cheese used in many Mexican dishes. The cheese gets its name from the Mexican state where the style originated.

At the Chula Vista plant, named for its beautiful view of Lafayette County dairy farms, about 80 people work two shifts making two styles of Mexican cheese.

Chula Vista and V&V Supremo of Chicago were cheesemaking partners for decades. This September, V&V bought the plant, where employment has risen to 80 from 34 about seven years ago.

Although Chula Vista purchased and sold Oaxaca cheese for several years, “we were never happy with the quality, so we decided to move production in-house,” Dahmen says. “I had spent 14 years making a related style but there were challenges to our ‘make,’ so we went to CDR. They helped us from the beginning.”

Funded by dairy farmers and industry, the Center for Dairy Research maintains a licensed, operating dairy plant on the UW-Madison campus. At the center, more than 30 researchers conduct basic and applied dairy research on the functional, flavor and physical properties of milk and cheese, as ingredients and finished products.

CDR staff build on a combined total of almost 300 years of experience in industry, and more than 400 years in academia, to assist the dairy industry in developing and testing products for national and international markets.

Starting around 2010, Dahmen and Alan Hamann, V&V’s senior manager of quality control, talked over the details of fat-protein ratios, milk solids, chemistry and pH with CDR.

“You have to control all of these factors even as the milk changes subtly from one truckload to the next,” says Hamann, who has more than 36 years of experience in the dairy industry.

Once the ideas were collated, they needed to be tested. At Browntown, each test would require 5,000 pounds of milk, Hamann says. Vats at CDR, however, would require only 500 pounds, reducing cost and eliminating errors attributable to running tests with different batches of milk. “At the CDR, we could test several variables at once,” Hamann says. “Working at CDR drastically cuts your timeline, and offers much more control.”

When the improved Oaxaca reached the market in 2015, Chula Vista was producing one or two vats per week. Now the company makes that much in a day.

Read the full story: http://news.wisc.edu/magic-plus-uw-science-equals-world-champ-cheese