Truffle oil is probably your best inexpensive starting point for a burger. Most commercial versions use added aroma compounds to imitate part of the truffle scent, so they won’t give you all the complexity of fresh shavings. You may still enjoy the flavor. [American Chemical Society](https://www.acs.org/molecule-of-the-week/archive/d/2-4-dithiapentane.html)

Mix a drop or two into a tablespoon of mayonnaise, then taste before adding more. Spread it on the finished burger. Truffle oil can quickly become overpowering.

You could also try:

- A little truffle salt sprinkled on the cooked burger or fries.
- Mushroom-and-truffle paste, often called *tartufata*, as a convenient burger topping. Check the ingredients for actual truffle content and added flavoring.
- Sautéed mushrooms or a little porcini powder for earthy, savory depth, though they won’t duplicate truffles’ distinctive aroma.

Ask the restaurant whether it used truffle oil or truffle mayo alongside the shavings. That could help you recreate the flavor you loved.