In Milan, smashburger restaurants styled after New York hot spots such as 7th Street Burger are all the rage. Think graffitied walls, pounding hip-hop, and the essentials: thin patties of ground chuck, white onions, pickles, and cheddar, all tucked into a Martin’s potato bun.

The trend took hold of Italy’s fashion capital in 2022, when Chuck George, a 37-year-old Filipino-American entrepreneur, opened Chuck’s, a small spot inside Sidewalk Kitchens, a collective of independent restaurants near the city center. His strict “no modifications” rule (“If you want to change an ingredient, you aren’t eating Chuck’s”) and sleek branding quickly inspired a slew of copycats across town.