Mashed Potatoes and Steak Casserole Recipe

With this old country classic mashed potato casserole, you can enjoy a simple yet flavorful savory steak. You can find creamy mashed potatoes on top. And it only takes 30 minutes to bake the casserole!

Mashed Potatoes and Steak Casserole Recipe

How To Make Mashed Potatoes and Steak Casserole

Mashed potatoes make up more than half of this dish. But they are well-seasoned with a taste of creaminess. Not to mention some tasty chuck steak bits.

Prep: 20 mins
Cook: 1 hr
Total: 1 hr 20 mins


  • lb sirloin steak, cut into 1-inch cubes
  • lb mashed potatoes, prepared, kept warm
  • cups milk
  • 2 cups mixed vegetables, frozen, thawed
  • ½ cup all-purpose flour
  • cup beer, of your choice
  • ¼ cup olive oil
  • 2 oz fried onions, preferably French’s, divided
  • 1 tbsp Italian seasoning, or your preferred seasoning blend
  • salt and ground black pepper, to season
  • cooking spray

For Garnish:

  • 1 sprig parsley
  • 1 oz fried onions


  1. Preheat oven to 350 degrees F. Grease a baking casserole of your choice.

  2. Add flour and Italian seasoning in a large mixing bowl. Season with salt and pepper, stir to combine.

  3. Heat roughly ⅛ of oil in a wide skillet over medium-high heat.

  4. Dredge your beef cubes and the seasoned flour, then sear in batches until golden brown, roughly 3 to 5 minutes per batch. Turn frequently, set aside.

  5. In the same skillet, add the thawed mixed vegetables. Saute briefly, then add the remaining seasoned flour and roast briefly then add the beef.

  6. Deglaze with beer and reduce briefly.

  7. Add the milk, then bring to a boil. Reduce to a simmer and continue simmering for at least 15 minutes or until reduced by half.

  8. Adjust seasoning with salt and pepper and add 2-ounce of the dried onion.

  9. Transfer the beef mixture to your greased baking casserole.

  10. Spread the mashed potatoes on top to cover all spaces. You may also design the mashed potatoes based on your preference and bake for about 30 minutes.

  11. Portion accordingly while still warm. Garnish with parsley and fried onion and serve.


  • Sugar: 8g
  • :
  • Calcium: 203mg
  • Calories: 802kcal
  • Carbohydrates: 105g
  • Cholesterol: 79mg
  • Fat: 25g
  • Fiber: 9g
  • Iron: 4mg
  • Monounsaturated Fat: 10g
  • Polyunsaturated Fat: 2g
  • Potassium: 1714mg
  • Protein: 39g
  • Saturated Fat: 8g
  • Sodium: 354mg
  • Vitamin A: 3284IU
  • Vitamin C: 83mg
Nutrition Disclaimer
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