The <i>Reinheitsgebot</i> Bavarian beer purity law [0] restricted the allowable ingredients for &quot;beer&quot; to water, barley, hops, and yeast.<p>US Federal Standards of Identity for bourbon restricts ingredients to at least 51% corn (<i>Zea mays</i>) in the mash, new charred oak barrels, and mandates alcohol content in the final product.<p>The specific type of bourbon traded as Tennessee Whiskey has additional requirements for charcoal filtering and geographical origin.<p>There is ample precedent for regulating the ingredients, processes, and geographic origins of food or beverage products using a particular product name.<p>It doesn&#x27;t even need to have the force of regulatory law behind it.  You could invent a trademark for frijoles refritos, and license it as a marketing aid to any manufacturer willing to meet your requirements.<p>Specify that the ingredients must be specific types of beans without their skins, chicken stock, onion, garlic, pork fat, salt, and a consistent spice mix which may include any herb from a pre-approved list.  You could require different qualifiers for pinto beans (no qualifier, or &quot;norteño&quot;), black beans (&quot;negro&quot;), kidney beans (&quot;rojo&quot;), or subbing vegetable oil and vegetable stock for chicken broth and pork fat (&quot;vegetariano&quot;).<p>And there you are.  Just look for the trademarked logo on cans, and you can be assured that you are eating &quot;real&quot; refrito beans.  In theory, this is no different from putting the UL logo on a tested appliance, or a Kosher-certifying logo on compliant foods.  An independent food certification company can operate entirely on quality control inspectors, marketers, public relations flacks, and trademark lawyers.<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Reinheitsgebot" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Reinheitsgebot</a>