Mushroom & Onion Grilled Cheese Sandwiches

Total Time

Prep/Total Time: 25 min.


4 servings

Updated: Jan. 21, 2023
We took grilled cheese up a notch with baby portobello mushrooms, bacon and cheddar. For weeknight comfort food, it’s good to the last crumb. Readers of my blog,, love these! —Blair Lonergan, Rochelle, Virginia
Mushroom & Onion Grilled Cheese Sandwiches Recipe photo by Taste of Home


  • 3 tablespoons butter, softened, divided
  • 8 ounces sliced baby portobello mushrooms
  • 1 small onion, halved and thinly sliced
  • 8 thin slices cheddar cheese (about 3 ounces)
  • 8 slices Texas toast
  • 4 bacon strips, cooked and crumbled


  1. In a large nonstick skillet, heat 1 tablespoon butter over medium-high heat. Add mushrooms and onion; cook and stir 4-5 minutes or until tender. Remove from pan. Wipe skillet clean.
  2. Place 1 slice cheese on each of 4 bread slices. Top with mushroom mixture, bacon and the remaining cheese and bread. Lightly spread outsides of sandwiches with remaining butter.
  3. In same skillet, toast sandwiches in batches over medium heat 45-60 seconds on each side or until golden brown and cheese is melted.

Nutrition Facts

1 sandwich: 406 calories, 21g fat (11g saturated fat), 54mg cholesterol, 729mg sodium, 39g carbohydrate (5g sugars, 2g fiber), 16g protein.