Delta has its Biscoff cookies, which are made by the Belgian bakery to this day. In 2015, United introduced its Stroopwafel — a waffle-like cookie with caramel, cinnamon, and bourbon vanilla ...

partnered with the Belgian bakery producing them in the 1990s. The Stroopwafel is another iconic plane treat originating from northwestern Europe. United Airlines (UAL) began serving the waffle ...