Leftover Pot Roast Casserole


I made a very large pot roast and gave some to my neighbor. The next day she shared this leftover roast beef casserole recipe she had made with it. It's absolutely delicious and a great idea to use up those leftovers.

Prep Time:
10 mins
Cook Time:
35 mins
Additional Time:
5 mins
Total Time:
50 mins
1 8-inch casserole


  • 1 ½ tablespoons butter, divided

  • ½ pound baby carrots, cut into horizontal quarters

  • ¾ cup chopped onion

  • 2 stalks celery, chopped

  • 2 cups shredded leftover pot roast

  • 2 cups boiling water

  • ½ cup milk

  • 1 (4 ounce) package scalloped potatoes (such as Idahoan®)


  1. Preheat the oven to 425 degrees F (220 degrees C). Grease an 8x8-inch baking dish.

  2. Melt 1/2 tablespoon butter in a skillet over medium-high heat. Add carrots, onion, and celery; cook until tender, 5 to 8 minutes. Stir in shredded pot roast; set aside.

  3. Stir together boiling water and remaining 1 tablespoon butter in a large bowl until butter is melted. Mix in milk, potatoes, and the envelope of sauce mix from the box. Add pot roast mixture and stir until combined. Pour into the prepared baking dish.

  4. Bake in the preheated oven until potatoes are fork-tender, 30 to 40 minutes. Remove from the oven and let sauce thicken for 5 minutes before serving.

Nutrition Facts (per serving)

513 Calories
30g Fat
30g Carbs
31g Protein
Nutrition Facts
Servings Per Recipe 4
Calories 513
% Daily Value *
Total Fat 30g 38%
Saturated Fat 13g 63%
Cholesterol 112mg 37%
Sodium 612mg 27%
Total Carbohydrate 30g 11%
Dietary Fiber 5g 17%
Total Sugars 6g
Protein 31g
Vitamin C 9mg 45%
Calcium 101mg 8%
Iron 4mg 23%
Potassium 772mg 16%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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