A hot dog with fries is about as classic as American fast food gets. The Truffle Fries Dog ($90) moves the side onto the bun: the menu describes it as "a full portion of truffle fries" on a hot dog. It's new at Hotdogray as of October 2026, inside AI DARTS in Taipei's Da'an District.
What Is a Truffle, Anyway?
Truffles are fungi that grow underground, and they only form in partnership with the roots of trees like oak and hazelnut. The most famous are the black Périgord truffle from southwestern France and the white truffle from around Alba in Italy's Piedmont region. They're pricey for simple reasons: they're seasonal, they only grow in certain places, white truffles still essentially can't be cultivated, and harvesting them means sending trained dogs to sniff them out.
Why Truffle Fries Are Everywhere
Since fresh truffles are expensive and seasonal, most restaurant truffle dishes rely on truffle oil or truffle salt instead. Those are available year-round and cost far less than fresh truffles, which is a big reason truffle flavor spread so widely. Truffle fries are one of the most common uses: toss hot fries with truffle-flavored oil or salt and the aroma comes right through.
Fries in the Bun: Americans Do It Too
Fries piled on a sausage in a bun isn't a gimmick in the US. Cleveland, Ohio has a local classic called the Polish Boy: a kielbasa in a bun topped with layers of french fries, barbecue sauce and coleslaw.
Two Fries Dogs on Hotdogray's Menu
- Cheese Fries Dog $80: cheese sauce and fries.
- Truffle Fries Dog $90: a full portion of truffle fries.
If you want rich and cheesy, go for the Cheese Fries Dog. If you're after that truffle aroma, get the Truffle Fries Dog. And if you were going to order a hot dog with a side of truffle fries anyway, ordering them separately is an Original Hot Dog ($50) plus Truffle Fries from the fried sides ($65). The Truffle Fries Dog puts it all together for $90.
Add-ons and Combos
Every hot dog takes add-ons, this one included: Cheese +$10, Bacon +$12, Jalapeño +$10, Country Gravy +$15, Chili or Salsa +$25, Mac & Cheese +$30. The rest are on the menu. After ordering a hot dog you can add a combo: +$39 for mac and cheese; +$59 for a $50 fried item and a $40 drink; +$89 adds a $40 panini; +$99 adds a $55 walking taco. Anything above the included value is charged as an extra.
Who It's For
The only topping listed for this one is the truffle fries, with no chili and no peppers, so it's a safe pick if you don't do spicy. Fries are bar food to begin with, so it goes down easy with a beer between darts games. For the other new items, see What Is Country Gravy? and the Mac & Cheese Dog. Every hot dog on the menu is covered in the hot dog flavors guide.
FAQ
Q: How much is the Truffle Fries Dog?
A: $90, a hot dog topped with a full portion of truffle fries.
Q: Can I order truffle fries on their own?
A: Yes. Truffle Fries are $65 in the fried sides.
Q: Is the Truffle Fries Dog spicy?
A: No spicy toppings are listed, just the truffle fries. Add jalapeños for +$10 if you want some heat.
Q: When can I get it?
A: Wed, Thu, Fri + every other Sat, 8PM to around midnight. The kitchen is closed on Tuesdays. Weather or special circumstances can change that, so message us on LINE to be sure.
