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A Texas resident has filed a lawsuit alleging he developed an allergic reaction after receiving onions on a fast-food order he explicitly requested without onions, raising renewed questions about restaurant handling of allergy requests and liability. The case, lodged in Harris County court, also notes prior litigation by the same plaintiff against another quick-service chain.
The complaint, filed in the 269th Judicial District Court in Harris County, says the customer — identified in court papers as Demery Wilson — picked up a Whataburger order on July 24, 2024 and asked that it contain no onions. According to the filing, onions were nevertheless present and prompted symptoms that required medical attention.
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In court filings, Wilson’s legal team alleges the item he received was contaminated at the time it left the restaurant and that the product was therefore unsafe. The plaintiff is seeking monetary damages in excess of $250,000 but less than $1 million.
- Where: 269th Judicial District Court, Harris County, Texas
- Plaintiff: Demery Wilson
- Alleged incident date: July 24, 2024
- Claim: Onions were included despite a “no onions” request, leading to an allergic reaction and medical treatment
- Relief sought: More than $250,000 and less than $1 million
- Company response: Whataburger has denied the allegations in court and asked for proof
Whataburger, headquartered in San Antonio, responded in court documents that it denies the allegations and contends it did not know, nor should it have known, that any product sold to the plaintiff was defective or dangerous. A company spokesperson declined to comment on the pending litigation when contacted.
Why this matters now
Allergy-related mistakes at quick-service restaurants can have immediate health consequences, and this lawsuit touches on two important practical and legal points: first, how restaurants document and honor special requests; second, the standards applied by courts when customers claim food caused injury. Customers who rely on modifications to avoid allergens face real risk if orders are prepared incorrectly.
Whataburger’s online allergen information lists common ingredients such as wheat, soy, eggs and milk, but does not identify onions as an allergen. The complaint cites a defect in the food “at the time it left” the restaurant, a legal formulation that aims to establish liability for serving unsafe food.
Context and precedent
This is not the first time the same plaintiff has sued a fast-food chain alleging an unwanted presence of onions. Earlier litigation filed on his behalf against Sonic in 2024 made similar claims; that case is also moving through the legal process with the defendant seeking proof and, in that instance, a jury determination.
Cases like these often turn on documentation: recorded orders, kitchen procedures, surveillance or employee testimony, and medical records linking symptoms to ingestion. Courts also weigh whether a food item was “defective” or whether a known allergy was communicated clearly and handled appropriately.
For consumers, the immediate takeaway is practical: keep clear records of special requests, save receipts and packaging, take photos if necessary, and seek prompt medical care for suspected allergic reactions. Those steps can be important both for health and, if pursued, for a legal claim.
What to watch next
The lawsuit will advance through typical civil-procedure stages: discovery, possible motions, and either trial or settlement. Whataburger’s formal denial — and its demand that the plaintiff produce supporting evidence — signals the company will contest the allegations rather than settle immediately.
Observers should watch for documents produced in discovery (such as order records or internal policies), any independent medical evidence tying the reaction to onions, and whether the case prompts corporate changes in how special-order requests are tracked and fulfilled.
While most quick-service encounters are uneventful, lawsuits like this underscore that a single kitchen error can have significant health and legal consequences for both customers and chains.
