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What’s your favorite secret menu item @innout ? MIne is a Flying Dutchman with a whole grilled onion wrap! A “whole grilled onion Flying Dutchman” is an In-N-Out Burger “secret menu” item consisting of two beef patties and two slices of cheese, with two whole, grilled onion slices serving as the “buns”. To order this off-menu item, you must specifically ask for “a Flying Dutchman with a whole grilled onion wrap”. #innout #flyingdutchman | Aframe24

The secret menu of In-N-Out burger revealed!