Corned beef with parsley sauce is delicious and comforting. Although I don’t have a drop of Irish blood, I’ve enjoyed celebrating St. Patrick’s Day since I was first introduced to the holiday.
I love choosing a good corned beef brisket, gathering the simple ingredients, bringing out my favorite pot, and letting the stove do the work. To give the meal a fresh twist, I make a creamy white parsley sauce — a béchamel with bright parsley and a touch of mustard — that pairs beautifully with tender corned beef.

Below you’ll find background on St. Patrick’s Day, a quick explanation of corned beef, helpful ingredient tips, equipment recommendations, step-by-step cooking instructions, storage notes, leftover ideas and frequently asked questions to help you prepare this classic meal with an elegant parsley sauce.
In this Article
- What is Saint Patrick’s Day?
- What exactly is corned beef?
- Ingredient tips for Corned Beef with Parsley Sauce
- Equipment needed
- Cooking tips and step-by-step instructions
- Pro tips
- Storage and reheating
- What to make with leftovers
- Frequently Asked Questions
- Corned Beef with Parsley Sauce (recipe)
What is Saint Patrick’s Day?
St. Patrick’s Day is observed on March 17 in honor of St. Patrick, the patron saint of Ireland. It began as a religious feast day and has been commemorated by the Irish for more than a thousand years. When Irish immigrants settled in the United States, they carried the tradition with them and helped make the day a wider cultural celebration. Today, cities like New York and Boston host large annual parades, and people of all backgrounds join the festivities.
What exactly is corned beef?
Corned beef is beef brisket cured in a salt-based brine. Historically, curing preserved meat before refrigeration; the basic technique remains the same today. Brisket is the most common cut for corned beef because its connective tissue breaks down during long, slow cooking, producing tender, flavorful meat. Serving corned beef with cabbage became common among immigrants who paired the affordable, seasonal vegetable with the cured meat.
Ingredient tips for Corned Beef with Parsley Sauce
This overview highlights key ingredients. Read the recipe instructions below for precise steps.
Corned beef brisket: Most store-bought briskets include a packet of pickling spices. Use those spices when cooking the brisket for traditional flavor.
Carrots: Peel and chop carrots into even, bite-size pieces so they cook uniformly and complement the meat.
Yellow onion: Onion adds depth to the cooking liquid and to the parsley sauce when a small amount is reserved for the sauce.
Cabbage: Choose a firm head with tightly packed leaves and quarter it for cooking alongside the brisket.
Whole milk: Use whole milk for the béchamel base of the parsley sauce to achieve a rich, creamy texture.
Flour: All-purpose flour thickens the sauce; cook it briefly with butter before adding milk to avoid a raw flour taste.
Unsalted butter: Use unsalted butter so you can control the final seasoning of the sauce.
Parsley: Flat-leaf parsley adds bright, herbaceous flavor. Chop both leaves and the tender parts of stems for extra flavor.
Mustard and nutmeg: A small amount of mustard adds a gentle tang to the sauce, while a pinch of nutmeg enhances the béchamel’s warmth.

Equipment needed
These are the tools I recommend and use for this recipe:
- Large Dutch oven or heavy pot
- Skimmer or large spoon for removing foam
- Aluminum foil
- Small saucepan for the sauce
Cooking tips and step-by-step instructions
This dish combines two components: slow-cooked corned beef with vegetables and a creamy parsley sauce. The brisket cooks longest, so begin with the meat. You can make the sauce while the meat simmers and finish it with some of the reserved cooking liquid for added flavor.
Let’s start with the corned beef
- Place the corned beef into a large Dutch oven and add the spice packet that comes with the brisket.
- Add the peeled and chopped carrots and most of the chopped onion, then cover everything with water.
- Bring to a boil, skim off any gray foam that forms on the surface, then reduce the heat and simmer gently.
- Simmer, covered, for about 2½ hours or until the meat is tender.
- Add the cabbage for the final 5 minutes of cooking, then remove the cabbage and keep it covered to stay warm.
- Remove the brisket from the liquid, wrap it in foil, and let it rest. Reserve about ¾ cup of the cooking liquid for the sauce.


Meanwhile, prepare the parsley sauce
The parsley sauce is essentially a béchamel with chopped parsley for freshness. Keep the heat moderate and whisk continuously to ensure a smooth sauce.
- Melt butter in a small saucepan, add the reserved chopped onion and cook until translucent.
- Whisk in the flour and cook briefly to form a roux with a light, nutty aroma.
- Slowly add milk while whisking to prevent lumps. Add the reserved cooking liquid for extra flavor.
- Stir in minced parsley, a little mustard, and a pinch of nutmeg. Season with salt and pepper to taste.
- Cook, whisking constantly, until the sauce thickens. If it becomes too thick, thin it with a splash of the reserved cooking liquid or milk.
- Spoon the sauce over sliced corned beef and serve immediately.

Pro Tips
When making a roux, cook the butter and flour until the mixture develops a fragrant, slightly nutty aroma — this removes the raw flour taste and improves the sauce’s flavor. Keep your whisk moving when you add liquid, and use room-temperature milk to reduce lumps.

The finished parsley sauce is rich and savory. I serve extra on the table so guests can add more to their portions.
Storage instructions and reheating
Store corned beef in an airtight container in the refrigerator for several days. You can freeze the brisket for up to two months, but I do not recommend freezing the parsley sauce as emulsion-based sauces can separate on thawing and reheating.
To reheat leftover corned beef, warm it slowly in a covered dish in a low oven to keep it moist, or slice and warm gently on the stovetop with a splash of cooking liquid.
What can you prepare with leftovers?
Leftover corned beef makes excellent Reuben sandwiches with Swiss cheese, sauerkraut and Thousand Island or Russian-style dressing. It also works well in hashes or tucked into an omelet for a hearty brunch.

Related recipes to try
If you like this dish, you might also enjoy other beef or seafood recipes with bold sauces and simple sides.
Frequently Asked Questions
Is corned beef just brisket?
Corned beef is typically made from brisket, a cut from the lower chest of the cow. The brisket is cured in a brine solution and then cooked slowly until tender.
Is pastrami the same as corned beef?
Pastrami and corned beef start from similar curing techniques, but pastrami is often smoked after seasoning and can use a different part of the brisket or other cuts that have more marbling. The results and flavor profiles differ.
What makes corned beef special?
Corned beef transforms an economical cut into a flavorful, tender main course by curing it in brine and then cooking it slowly. The long cooking time breaks down connective tissue and enriches the cooking liquid with savory flavor.

Equipment used to prepare this recipe
Large Dutch oven, small saucepan, skimmer, and foil — nothing elaborate required.
Corned Beef with Parsley Sauce

Ingredients
- 3 pounds corned beef brisket
- 2 carrots, cleaned and chopped
- 1 yellow onion, chopped
- 1 large cabbage, quartered and cored
- 2 tablespoons unsalted butter
- 2 tablespoons unbleached all-purpose flour
- ¾ cup whole milk
- 2 teaspoons flat-leaf parsley, minced
- ½ teaspoon mustard
- Pinch of nutmeg
Instructions
CORNED BEEF
- Place the corned beef and spice packet into a large pot. Add the carrots and most of the chopped onion. Cover with water and bring to a boil. Reduce heat to medium-low and skim any foam from the surface.
- Cover and simmer for about 2½ hours, or until the corned beef is tender.
- Add the cabbage and cook for another 5 minutes, then let it rest in the pan with the juices until tender.
- Remove the brisket from the liquid, wrap in foil and set aside. Reserve about ¾ cup of the cooking liquid for the sauce.
PARSLEY SAUCE
- Melt the butter in a small saucepan over medium heat. Mince the reserved onion and add to the butter, cooking until translucent.
- Whisk in the flour and cook for about 1 minute.
- Add the reserved cooking liquid and milk slowly while whisking to keep the sauce smooth. Stir in the minced parsley, mustard, nutmeg and season with salt and pepper.
- Cook for about 5 minutes, whisking constantly, until the sauce thickens. Serve over slices of corned beef.
Nutrition
Carbohydrates: 10 g |
Protein: 19 g |
Fat: 24 g |
Saturated Fat: 9 g |
Cholesterol: 80 mg |
Sodium: 1429 mg |
Potassium: 534 mg |
Fiber: 1 g |
Sugar: 4 g
Nutritional information is an estimate and not calculated by a registered dietitian.
Originally published on March 17, 2013. Updated on March 9, 2023.