Chicken Gloria casserole is flour-dredged chicken breasts seared, then baked in a mushroom cream sauce and topped with melted cheese, ready in about 55 minutes. Searing the chicken before it goes in the oven, even though it doesn't need to be fully cooked at that stage, builds a browned surface that the sauce and cheese topping can't replicate on their own.
Chicken Gloria Casserole
Ingredients
- 4 boneless, skinless chicken breasts
- 1/2 cup all-purpose flour (for dredging)
- 1/2 tsp salt
- 1/4 tsp black pepper
- 2 tbsp olive oil
- 2 tbsp butter
- 1 (10.5 oz) can cream of mushroom soup
- 1/2 cup chicken broth
- 1/2 cup sour cream
- 1 tsp garlic powder
- 1/2 tsp onion powder
- 1 cup sliced mushrooms
- 6 slices of deli-style Swiss or mozzarella cheese
- Chopped parsley, for garnish (optional)
Instructions
- Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
- Pound chicken breasts to even thickness if needed. Season flour with salt and pepper, then dredge chicken to coat.
- In a large skillet, heat olive oil over medium heat. Sear chicken for 3–4 minutes per side until golden (doesn’t need to be fully cooked). Transfer to baking dish.
- In the same skillet, melt butter. Add mushrooms and sauté 5–6 minutes until tender.
- In a bowl, mix cream of mushroom soup, broth, sour cream, garlic powder, and onion powder until smooth. Pour over chicken and mushrooms.
- Top each piece of chicken with a slice of cheese.
- Cover with foil and bake 25–30 minutes. Remove foil and bake 10 more minutes, or until cheese is melted and bubbly.
- Garnish with parsley and serve warm.
Recipe Notes
- • Great served over rice, egg noodles, or mashed potatoes.
- • Use Gruyère for an extra flavorful cheese option.
- • Can be assembled ahead and refrigerated until ready to bake.
Nutrition
- Serving Size
- 1 chicken breast + sauce
- Calories
- 520
- Sugar
- 3g
- Sodium
- 780mg
- Fat
- 32g
- Saturated Fat
- 14g
- Unsaturated Fat
- 14g
- Trans Fat
- 0g
- Carbohydrates
- 14g
- Fiber
- 1g
- Protein
- 42g
- Cholesterol
- 125mg
Why the chicken is dredged before searing
- Dredging the chicken in seasoned flour before searing gives the surface something to brown against, which is what creates the color and slight crust before the chicken finishes cooking in the sauce.
- Sautéing the mushrooms in the same skillet after searing the chicken, rather than in a separate pan, lets them pick up the browned bits left behind for a more savory sauce.
How to keep the coating from going gummy
- Pound the chicken to an even thickness first if needed, as the instructions note, so it sears and later bakes evenly instead of some parts finishing before others.
- Sear for the full 3-4 minutes per side the recipe calls for to build color, even though the chicken isn't meant to be fully cooked at this stage - it finishes in the oven.
Troubleshooting
The flour coating turns gummy instead of staying lightly crisp.
This can happen if the sauce is poured on before the seared crust has a chance to set, or if the chicken sits too long before baking. Transfer to the baking dish and into the oven relatively soon after searing.
The cheese on top isn't fully melted after the covered bake.
Use the final uncovered 10 minutes as the recipe specifies to let the cheese melt and bubble, extending it a few minutes if your oven runs cool.
Sauce appears curdled after baking.
gently reheat it in a saucepan with a splash of warm cream while whisking constantly to re-emulsify.
Refrigerate promptly and use within 3 to 4 days. Reheat covered, in the oven or microwave, until the chicken reaches 165°F (74°C); covering it limits drying, though the flour coating will be softer than when first baked.
The recipe's own notes suggest serving over rice, egg noodles, or mashed potatoes.
Frequently asked questions
Can I make Chicken Gloria Casserole ahead of time?
Yes! Assemble up to 24 hours in advance, refrigerate covered, and add an extra 10-15 minutes to the baking time when cooking from cold.
What’s the best cheese for Chicken Gloria Casserole?
Swiss cheese is traditional, but Gruyère, provolone, or a combination of mozzarella and Parmesan also work beautifully for different flavor profiles.
Can I use boneless chicken thighs instead of breasts?
Absolutely! Thighs provide more flavor and moisture. Adjust cooking time slightly as thighs may take a few minutes longer.
How do I know when my Chicken Gloria Casserole is done?
The casserole is ready when the internal temperature reaches 165°F, the sauce is bubbling, and the cheese topping is golden brown.
Can I make this casserole gluten-free?
Yes! Simply use gluten-free flour for thickening the sauce and verify that your chicken broth and other ingredients are certified gluten-free.
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