Air Fryer French Onion Grilled Cheese
Description
This air fryer French onion grilled cheese layers jammy caramelized onions, beef broth, thyme and melty Gruyère between buttery sourdough, crisped golden in about 8 minutes. All the flavor of French onion soup in a sandwich.
Ingredients
- 2 large yellow onions, halved and thinly sliced
- 2 tablespoons butter, for the onions
- 1/2 teaspoon kosher salt
- 1/2 teaspoon fresh thyme leaves
- 1/4 cup beef broth
- 1/2 teaspoon Worcestershire sauce, optional
- Black pepper, to taste
- 4 slices sourdough bread, about 1/2 inch thick
- 2 tablespoons butter, softened, for the bread (or mayonnaise)
- 4 ounces Gruyère cheese, shredded (about 1 cup)
Instructions
- Melt 2 tablespoons butter in a skillet over medium-low heat. Add the onions and salt. Cook, stirring every 5 minutes, until soft and deep amber, 35 to 45 minutes.
- Add the thyme, Worcestershire and beef broth. Scrape up the browned bits and cook until the liquid is absorbed, 2 to 3 minutes. Season with pepper.
- Butter one side of each bread slice.
- Place 2 slices butter-side down. Layer each with 1/4 of the cheese, half the onions, then another 1/4 of the cheese. Top with the remaining bread, butter-side up.
- Air fry at 360°F for 4 minutes. Flip and cook 3 to 4 minutes more, until golden and melted. Secure the top with toothpicks if it lifts.
- Rest 1 minute, slice and serve.
Equipment
- Large skillet (for the onions)
- Wooden Spoon
- Wide spatula (for flipping)
- Box grater (for the Gruyère)
- Cutting board and chef's knife
- Toothpicks or a small air fryer rack (optional, keeps the top slice in place)
Notes
The onions can be made up to 4 days ahead.
Nutrition
Serving: 1ServingCalories: 847kcalCarbohydrates: 81gProtein: 33gFat: 44gSaturated Fat: 26gPolyunsaturated Fat: 3gMonounsaturated Fat: 12gTrans Fat: 1gCholesterol: 123mgSodium: 2074mgPotassium: 453mgFiber: 5gSugar: 13gVitamin A: 1265IUVitamin C: 12mgCalcium: 686mgIron: 6mg