The Hula Burger was a meatless burger introduced in the 1960’s by Ray Kroc to McDonald’s. It was a substitute for American Catholics that would not eat meat on Fridays.
The burger was a slice of grilled pineapple with cheese on a bun. But this was designed to go up against the Filet-O-Fish, which was created by a Catholic McDonald’s Franchisee Lou Groen.
According to official McDonald’s history, in 1962, McDonald’s franchisee Lou Groen was noticing a severe decrease in sales around Lent and, already struggling with poor sales at the same time, decided to invent a fish sandwich to appeal to meat-avoiding Catholics during the Lenten season.
McDonald’s ended production of the Hula Burger early on, as it became quickly evident that its alternative, the Filet-O-Fish, was getting much better traction.