The Secret Ingredient You Should Be Using on Your Grilled Cheese

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A classic grilled cheese sandwich is one of life's simplest pleasures, but there's one easy tweak that takes it to the next level. This incredibly simple hack, endorsed by celebrity chef and author Gabrielle Hamilton, among others, uses an ingredient found in almost every refrigerator in the U.S. — none other than our old friend mayonnaise.

The Secret Ingredient You Should Be Using on Your Grilled Cheese

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