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A photo showing a pan with mashed potatoes
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5 from 8 votes

One pot creamy chicken mashed potato

A chicken and mashed potatoes casserole that is creamy and perfectly flavored.
Prep Time30 mins
Total Time30 mins
Course: Main Course
Cuisine: American
Diet: Halal
Servings: 8 servings
Calories: 270kcal
Author: Amira


  • 1 pound chicken breast cut into 1 inch cubes.
  • salt and pepper to taste.
  • 6 Tablespoons unsalted butter divided.
  • 8 oz fresh mushrooms sliced.
  • 2 large garlic cloves minced.
  • 2 Tablespoons flour.
  • 3/4 cup half and half or milk.
  • 1 cup chicken broth.
  • 1 cup diced bell pepper any color or combination.*
  • 3 cups mashed potato.**


  • Season chicken liberally with salt and pepper.
  • In a skillet over medium high heat, melt 2 Tablespoons of butter then add chicken and sauté until chicken is done, took me about 10 minutes. Transfer chicken to a bowl and set aside.
  • In the same pan add another 2 Tablespoons butter, add mushrooms and sauté until done almost 3-4 minutes.
  • In the same pan, add the remaining butter, then garlic and stir for a minute. Whisk the flour until golden for about another minute. Pour half and half or milk and the chicken broth whisking vigorously until it is smooth. Season with salt and pepper.
  • Preheat oven to 350F.
  • Add the chicken, mushroom and garlic mixture back to the pan.
  • Add bell pepper and mix everything well together and simmer for 2 minutes.
  • Turn heat off, spread the mashed potato on top. Level with the back of a spoon. Take a fork and make some lines or circles on top.
  • Place the skillet on a baking dish and bake in oven for 45 minutes or until top is golden brown.***
  • Serve hot.


*Bell pepper is optional but highly recommended. It gives this dish a unique flavor that you do not want to miss especially if you are a bell pepper fan. ** You can use any leftover mashed potato you have or make your own, I personally like Chef John’s recipe here https://allrecipes.com/recipe/219077/chef-johns-perfect-mashed-potatoes/ *** I did not brown mine much as my kids would not like that.


Calories: 270kcal | Carbohydrates: 23g | Protein: 16g | Fat: 13g | Saturated Fat: 7g | Cholesterol: 67mg | Sodium: 209mg | Potassium: 639mg | Fiber: 2g | Sugar: 2g | Vitamin A: 943IU | Vitamin C: 46mg | Calcium: 40mg | Iron: 1mg