Caramelized Onion Grilled Cheese Sandwiches With Miso Butter

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Democracy Dies successful Darkness

3.7 (9)

By Joe Yonan

These indulgent sandwiches get a bully tang from whole-grain mustard and a large deed of umami from the miso and the caramelized onions. Grilled food for dinner: Why not?

Storage: These sandwiches sensation champion erstwhile freshly made. Leftovers tin beryllium wrapped and refrigerated for up to 1 day. To reheat, lukewarm successful a 350-degree oven oregon toaster oven for 5 to 10 minutes.

Adapted from “Umami Bomb” by Raquel Pelzel (Workman, 2019).

Ingredients

1 tablespoonful extra-virgin olive oil
1 ample yellowish bulb (1 pound), thinly sliced
1/8 teaspoons good salt
1 tablespoonrice vinegar, preferably unseasoned
3 tablespoons unsalted butter, astatine country somesthesia (may substitute vegan butter, specified arsenic Miyoko)
2 teaspoons achromatic oregon acheronian miso paste
1 tablespoonful whole-grain mustard
4 slices good-quality sandwich bread
4 ounces grated Gruyère food (1 cup; whitethorn substitute vegan shredded cheese, specified arsenic Violife oregon Daiya)
Cornichons (a.k.a. gherkins), for serving (optional)

Nutritional Facts

Per serving

Calories
620
Fat
45 g
Saturated Fat
24 g
Carbohydrates
33 g
Sodium
960 mg
Cholesterol
105 mg
Protein
22 g
Fiber
2 g
Sugar
7 g

This investigation is an estimation based connected disposable ingredients and this preparation. It should not substitute for a dietitian’s oregon nutritionist’s advice.

Adapted from “Umami Bomb” by Raquel Pelzel (Workman, 2019).

Tested by Joe Yonan.

Published September 14, 2019

Updated March 16, 2026