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+ servings

Creamy Weber Q Chicken and Mushroom Casserole

My Weber Q chicken and mushroom casserole recipe is super creamy, amazingly tender and built to feed a small army. It also makes an ideal dish for entertaining.
5 from 1 vote
Prep Time 30 mins
Cook Time 45 mins
Total Time 1 hr 15 mins
Course Dinner
Cuisine American
Servings 4 people
Calories 1016 kcal


Chicken Casserole

  • 1.2 kg skinless chicken breast cut into 1inch strips
  • 450 g white mushrooms thinly sliced
  • 1 cup plain/all-purpose flour to coat the chicken
  • 1 red onion finely diced
  • 3 garlic cloves minced
  • 1 ½ tsp sea salt
  • ½ tsp ground black pepper
  • 6 tbsp olive oil divided

Ingredients for Sauce

  • 3 tbsp unsalted butter
  • 3 tbsp plain/all-purpose flour
  • 1 ½ cups chicken stock/broth
  • 1 tbsp lemon juice
  • ½ cup milk half cup milk & half cup cream combined
  • ½ cup heavy whipping cream
  • salt to taste


Chicken Casserole

  • Slice the chicken into 1-inch strips (smaller if preferred) and season both sides with salt and black pepper. Place the chicken inside a ziplock bag, then add the flour to coat. Shake off any excess flour before transferring the chicken to a plate.
  • Add 3 tbsp olive oil to a pan/skillet and saute the chicken over medium/high heat. Saute both sides of the chicken until it’s light golden brown. Next, Transfer the chicken to a 13 x 9 casserole baking dish, then wipe the pan/skillet clean using a paper towel.
  • Add a further 3 tbsp of olive oil back into the pan/skillet and saute the mushrooms with the onion for 5-7 minutes, stirring continously or until brown.
  • Into the pan, crush three cloves of garlic and cook for 1-2 minutes or until fragrant. Transfer the mushroom mixture to the baking dish with the chicken.
  • Set the Weber Q up for indirect cooking by placing a convection tray and trivet onto the grill. Preheat for 10 minutes with the lid down by turning the gas control knob/s to the START/HI position.


  • Wipe the pan/skillet clean with a paper towel and add 3 tbsp of unsalted butter until melted, then whisk in 3 tbsp of flour and let that saute for 1-2 minutes.
  • Add in chicken stock/broth and 1 tbsp of lemon juice, ¼ tsp black pepper and whisk until smooth. Add 1 cup of half and half milk and heavy whipping cream, and bring it to a light simmer. (taste the sauce and add salt to taste)
  • Pour the sauce evenly across the chicken and mushrooms and cover the baking dish with foil or a lid if you have one.

Baking Chicken & Mushroom Casserole

  • Place the baking dish onto the centre of the trivet and bake at 190°C (375°F) to 200°C (390°F) for 45 minutes with the lid down. Or turn the gas control knob down to the medium setting.
    Family Q: Turn the small gas control knob OFF and the large knob to the medium position.
  • Serve hot over mashed potato, rice, or pasta.


Calories: 1016kcal (51%)Carbohydrates: 41g (14%)Protein: 74g (148%)Fat: 61g (94%)Saturated Fat: 21g (131%)Polyunsaturated Fat: 5gMonounsaturated Fat: 30gTrans Fat: 1gCholesterol: 269mg (90%)Sodium: 1609mg (70%)Potassium: 1713mg (49%)Fiber: 3g (13%)Sugar: 5g (6%)Vitamin A: 964IU (19%)Vitamin C: 17mg (21%)Calcium: 103mg (10%)Iron: 4mg (22%)
Keyword Weber Q Chicken and Mushroom Casserole
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