“I won’t be coming back, but if you come by, bring one from home!” she added.
The upset woman posted her review accompanied by a photo of the receipt showing the charge.
According to Tripadvisor, the restaurant is rated No. 1 out of three dessert shops in the area and has 3.5 of 5 stars, based on 676 reviews.
The Post reached out to Gelateria Serafini for comment.
The review comes amid a flood of complaints about extra fees diners have been charged for absurd additions or services like extra spoons or cake cutting.
A diner at a restaurant in Italy was outraged to learn he’d been charged 15 euros — about $16 — to have a store-bought cake cut and served to his nine guests.
Another traveler in Italy took to the internet to vent after noticing she’d been slapped with a surprise 2-euro surcharge at a restaurant in the upscale Lake Como region — for having a sandwich cut in half.