The chocolate bar is so evenly distributed and you get a good amount of filling with each bite,” said Madison Chambers, a customer at Sahara Food.

Sarah Hamouda and Yezen Alani, the married couple behind the Can’t Get Knafeh chocolate bar, at their FIX Dessert Chocolatier location in Dubai. They were taken aback by the demand for the bar and the emergence of dupes worldwide. — Katarina Premfors/The New York Times