Question: What is the only condiment on a so-called “Texas burger”?
Answer: Mustard. Texans have been putting the yellow condiment on burgers since the early 1900s, and Whataburger popularized the practice when it was founded it 1950. Theories about why mustard has been the historical condiment of choice for Texans include the influence of German settlers, its long shelf-life, and its being cheaper than other condiments.
According to etymologist Barry Popik, a ketchup-only burger is a “Yankee burger,” while one with only mayonnaise is a “Sissy burger.”
