10 most expensive hamburgers

For a classic recipe that started life as just a handful of key ingredients, the humble hamburger has certainly come a long way from its fast food origins.
The basic patty of ground meat sandwiched between a sliced bread roll has evolved into a full-on gourmet affair.
These are the 10 most expensive burgers in the world; culinary works of gastronomic excellence with an astronomical price tag to match.

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