Miyoko Schinner is a perfect illustration of the American dream. To the U.S. dairy industry, however, she is something altogether different.

A Japanese immigrant, Schinner started a small company that blossomed into a wildly successful vegan cheese maker, one with the potential to do for dairy alternatives what Beyond Meat is doing for beef substitutes. Her business, Miyokoโ€™s Kitchen, began in 2014 as an e-commerce platform, trading on the popularity of her vegan cheese cookbook. After one weekend in which she received $50,000 worth of orders, Schinner knew her 40-pound batches wouldnโ€™t be enough to satisfy demand.

So she figured out how to make 1,500 pounds an hour, raised $25 million and built a 30,000 square-foot facility in Petaluma, Calif.

โ€œIt was very difficult to scale,โ€ said Schinner, now 61. Making dairy alternatives out of ingredients like cashews and rice miso doesnโ€™t always work as planned.

Today, her products are sold in 12,000 stores across the U.S. Sales are booming, Schinner said, citing growth of 168% last year. Her company now makes a whole line of dairy-free products, including versions of chรจvre, cream cheese, mozzarella, roadhouse cheese-and Schinnerโ€™s number one product: butter.

Until recently, the U.S. dairy industry had been relatively quiet about the proliferation of non-dairy products that use words like โ€œmilkโ€ or โ€œcheese.โ€ But lately itโ€™s been pushing back. Wisconsin, which calls itself Americaโ€™s Dairyland, is one of the biggest dairy producers in the country. Itโ€™s also Americaโ€™s biggest maker of actual butter. So when it came to the kind of โ€œbutterโ€ Schinner makes, Wisconsin and its powerful dairy lobby decided to draw the line.

Entrepreneurs such as Schinner have been riding a wave of popularity for plant-based products, especially dairy alternatives. Plant-based milk retail sales totaled $1.8 billion for the year ending May 25, a 6.5% increase. Cheese substitute sales totaled $117 million, showing 17.4% growth. Cashew butters were up to $12.6 billion, representing an uptick of 4.9%.

Milk sales, meanwhile, have been suffering a multi-decade decline.

Adam Spierings is a former dairy farmer. He asked 27 different banks to reconsolidate his debt, but none would consider it. He just took a job as a crop insurance adjuster while his wife teaches at a technical college. They recently sold their cows but are still trying to sell their other assets, including their farm and home in Weyauwega.

โ€œItโ€™s sad to think about what we had and what we were building and what we lost,โ€ Spierings said. โ€œBut in the grand scheme, weโ€™re not living in poverty like we were the last few years.โ€

Such dire circumstances have led some in the dairy industry, most notably lobbying groups like the National Milk Producers Federation, to campaign against alternative dairy products-specifically their use of dairy terms on labels. Changing consumer tastes are regularly cited as a chief cause of dairyโ€™s slow demise, but vegan products using labels such as โ€œmilkโ€œ-or in this case, โ€œbutterโ€œ-are seen by the milk lobby as misleading consumers to unfairly steal market share.

In September, the U.S. Food and Drug Administration announced it was โ€œconsidering approaches to modernize standards of identityโ€ of dairy foods and would be collecting comment from the public. (A review of the those comments, commissioned by the Plant Based Foods Association [PBFA], contends that 76% were fine with the status quo.)

Senators Tammy Baldwin of Wisconsin, a Democrat, and Jim Risch of Idaho, a Republican, are pushing the Dairy Pride Act, which would require the FDA to create a system of stricter nationwide enforcement for product labeling and the use of certain words. Under the proposal, labeling something โ€œmilk,โ€ for example, must mean the product comes from a โ€œhooved mammal.โ€ A House version has also been introduced by Representative Peter Welch, a Democrat from Vermont, and has 33 cosponsors.

States have been considering legislation of their own. The PBFA counts 10 that have tried or are trying to limit sales of dairy alternative products. Wisconsin, however, has tried taking a slightly different tack-at least when it comes to butter imitators. It ordered supermarkets to take any non-dairy product labeled โ€œbutterโ€ off of its shelves.

For 75 years, until the 1960s, margarine was banned in Wisconsin. Serving margarine instead of butter to students, patients or inmates at state-run institutions is still prohibited, unless requested by a doctor. Irish brand Kerrygold-one of the most popular butter brands in the U.S.-was also pulled from shelves in recent years due to a state regulation that requires all butter sold in Wisconsin to have a federal or state grade mark, effectively shutting out foreign butters. Ornua, which owns Kerrygold, made a deal with the state in 2017 to submit to its grading.

On April 15, Wisconsinโ€™s Department of Agriculture, Trade and Consumer Protection (Datcp) instructed retail food establishments to remove products that arenโ€™t complying with the statutory definition for butter, which requires that it be made from milk or cream. โ€œBy definition, a โ€˜veganโ€™ product … cannot be legally labeled and sold as butter,โ€ the state said. Products can be labeled as imitation butter, imitation margarine, or vegetable oil spread-but not the real thing, according to the memo.

Bob Bradley, a professor emeritus at the University of Wisconsin, Madison Department of Food Science and author of two books on the topic of butter, said in an interview that such products are mislabeled. โ€œIt is not butter,โ€ he said flatly.

This is not the first time Miyokoโ€™s butter has been challenged. Her company faced a proposed class action lawsuit last October in New York, but it was settled. Steve Ingham, director of the Datcp, said June 12 that the directive banning products such as Miyokoโ€™s has since been suspended in favor of a public comment period.

โ€œWe make a significant proportion of the nationโ€™s butter, and thatโ€™s a part of the dairy industry that has been doing well,โ€ he said in an interview. โ€œSo we take it seriously, and when I get complaints about this-these imitation butter products-we do follow up.โ€

During the almost two months the removal order was in effect, Miyokoโ€™s Kitchen said its products were pulled from at least one Whole Foods store in Madison and from the retail chain Skogenโ€™s Festival Foods. Whole Foods declined to comment. While Festival Foods confirmed Schinnerโ€™s products had been removed from its stores, no other products were singled out, said Kayla Paul, quality assurance and regulatory affairs specialist for the chain.

A health inspector arrived at one of Skogenโ€™s locations in mid-April, she explained. The auditor said the store couldnโ€™t have Miyokoโ€™s vegan butter on its shelves because of its use of the term โ€œbutter.โ€

โ€œThere was a lot of back and forth-โ€™Whose regulation is this?โ€™โ€ she said. โ€œWe thought, if itโ€™s a Wisconsin regulation, why arenโ€™t other stores doing it, too?โ€

Schinner said she offered the state a solution: Her company would have stores affix stickers that say โ€œvegetable spread,โ€ if the state would approve it. But the Datcp didnโ€™t respond for more than a month, her company said. The Datcp approved the label on June 12.

Ingham, the Wisconsin official, said his agency isnโ€™t planning to enforce labeling laws on other dairy products, such as fluid โ€œmilk,โ€ but will follow the FDAโ€™s lead.

โ€œItโ€™s always good to check on the legality of the label,โ€ Ingham said, adding that Wisconsin produces more than a third of the nationโ€™s butter. โ€œItโ€™s been an important product.โ€