{"id":7076531,"date":"2026-10-05T05:43:15","date_gmt":"2026-10-05T05:43:15","guid":{"rendered":"https:\/\/fivemor.com\/?p=7076531"},"modified":"2026-10-05T05:43:15","modified_gmt":"2026-10-05T05:43:15","slug":"french-onion-smash-burgers-with-caramelized-onion-jam-and-gruyere-%f0%9f%87%ab%f0%9f%87%b7%f0%9f%a7%85%f0%9f%8d%94","status":"publish","type":"post","link":"https:\/\/fivemor.com\/?p=7076531","title":{"rendered":"French Onion Smash Burgers with Caramelized Onion Jam and Gruy\u00e8re \ud83c\uddeb\ud83c\uddf7\ud83e\uddc5\ud83c\udf54"},"content":{"rendered":"


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French onion burgers are the answer for the nights you don\u2019t know what to make for dinner. The smell of the onions alone, forty-five minutes of low-and-slow caramelization before the cast iron even goes on, has us drooling before these are anywhere near ready to eat. Everything we love about French onion soup and everything we love about a great burger in one crispy, jammy, Gruy\u00e8re-covered bite. That\u2019s dinner.<\/p>\n

\"Three<\/figure>\n

The mustard is a trick that a friend showed us once, and it\u2019s the thing that makes the crust. Classic yellow mustard \u2013 not Dijon<\/em> \u2013 spread on the patty before it hits the griddle has a specific acidity and water content that reacts with the heat and builds a darker, more textured sear than beef alone would produce. We\u2019ve been using this trick on most of our thin patties since we first saw it and the difference shows up in the crust color and in the flavor. <\/p>\n

The other trick: the onion jam is not done when you think it\u2019s done. Onions release water before they brown, which means you\u2019re waiting through a steaming phase before you ever see caramelization. Rush the heat to skip it and you get soft, sweet onions. Stay the course on medium-low for the full 45 to 60 minutes and you get jam\u2026 thick, glossy, spoonable, with a depth of flavor the quick version can\u2019t build.<\/p>\n

Put it together and what you have is a burger that tastes like French onion soup but better. <\/p>\n

\"Top-down<\/figure>\n

\ud83d\udd2a Ingredients for French Onion Burgers<\/h2>\n

For the Onion Jam:<\/strong><\/p>\n