The rule "don’t order what you can make at home" definitely applies here. And you should be especially wary of eateries that make your guacamole tableside and serve it up in fancy traditional molcajete stone bowls. All that “authenticity” and traditional preparation comes at an added cost – a trick that restaurants use to apparently “add value” or rather a few extra dollars to the price of an otherwise relatively basic dish. Restaurants pay about $0.50 -$1.00 for a single avocado but will charge a party of diners anything up to $14 for a bowl of tableside-prepared guacamole with tortilla chips, salsa and other additional but inexpensive flourishes.
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