Buns and burgers are the epitome of American soft power. Although many Europeans these days are more than a little weary of where America is currently headed politically, Statista's Dyfed Loesche notes that this skepticism doesn't seem to extend to the kitchen.
As Dalia Research has found out, Germans have the munchies for buns & burgers and even such culturally cagey people as the French seem to soften a little with a patty in a bun in mind.
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This development probably is closely tied to the craft-burger scene which has made American fast food seem less of an industrialized assembly-line sort of cuisine.
What America hasn't been able to do by force it has achieved through the export of its open for all culture, most notably music and food. Buns & burgers have conquered more hearts and minds than tanks and guns ever could have.
Throw in some coke, ketchup and fries and you've got some life-time allies.