Want something different than the usual St. Patrick's Day dinner? How about this layered Corned Beef Potato Gratin with Brussels Sprouts? Let me show you! keviniscooking.com
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4.71 from 17 votes

Corned Beef Potato Gratin with Brussels Sprouts

Prep time does not include the time needed to cook your corned beef. Cook either using a pressure cooker or your favorite method.
Prep Time15 mins
Cook Time50 mins
Total Time1 hr 5 mins
Course: Dinner, Main
Cuisine: Irish, Western
Keyword: corned beef, corned beef hash, potato gratin recipe
Servings: 6 servings
Calories: 337kcal
Author: Kevin Is Cooking


  • 1 1/2 lbs corned beef cooked, sliced thin
  • 1 Russet potato large, sliced 1/4" thin
  • 2 cups milk
  • 2 tbsp butter
  • 2 tbsp of flour
  • 4 shallots sliced thin
  • 3 cups Brussels sprouts sliced thin
  • 1/2 cup Parmesan cheese


  • Preheat oven to 425°F. Coat a 9x9” casserole dish with oil or butter, set aside.
  • Using a mandolin or knife slice the potato into 1/4 inch slices. Slice the cooked corned beef thin and set aside. Slice the shallots and Brussels sprouts thin and set aside.
  • In a large saucepan add the sliced potato and cover with milk and butter. Bring to a boil, lower heat and simmer 8 minutes. Turn off heat and allow to cool, enough to handle. Reserve the milk and butter, set aside.
  • Layer the potato then the corned beef slices, shallots and Brussels sprouts. Repeat again using all ingredients.
  • Whisk the flour into the milk and pour milk over all and top with Parmesan cheese. Bake for 50 minutes. Top will be a deep, crispy brown. Allow to cool at least 15 minutes before slicing to set and serve.


If you're converting meat from a slow cooker to an Instant Pot, follow this rule: if the meat dish cooks in eight hours on low or four hours on high in the slow cooker, it will cook in 25-30 minutes in the Instant Pot. Make sure the Instant Pot setting reads "sealing" and not "venting" to ensure it's cooked properly.


Serving: 1g | Calories: 337kcal | Carbohydrates: 21g | Protein: 20g | Fat: 19.5g | Saturated Fat: 8.2g | Trans Fat: 0.1g | Cholesterol: 64.5mg | Sodium: 1173mg | Fiber: 2.9g | Sugar: 6.5g