Slow Cooker Beef Brisket with Garlic Butter Mashed Potatoes

There’s something about this dish that feels like a quiet Sunday in January—warm, unhurried, and made entirely for the people you love. I’ve been making this slow cooker beef brisket with garlic butter mashed potatoes since my daughter was little, and it’s always been my go-to when I want comfort that doesn’t require me to stand over the stove all afternoon. The secret? I always finish the mashed potatoes with a little extra browned butter and a pinch of nutmeg, a trick my own mother swore by, which makes all the difference in flavor.

Slow Cooker Beef Brisket with Garlic Butter Mashed Potatoes

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Prep Time 25 minutes mins

Cook Time 7 hours hrs

Total Time 7 hours hrs 25 minutes mins

Servings: 6 servings

Calories: 482

Ingredients Method Notes

Ingredients

  

For the Beef Brisket

• 3 pounds beef brisket flat cut trim excess fat to about 1/4 inch
• 1 cup red wine dry red wine works best
• 1 cup beef broth
• 3 cloves garlic smashed and peeled
• 1 tablespoon dried thyme
• 1 teaspoon black pepper
• 1 teaspoon salt

For the Garlic Butter Mashed Potatoes

• 2 pounds Yukon Gold potatoes peeled and cut into 1-inch chunks
• 4 tablespoons unsalted butter
• 2 cloves garlic minced
• 1/2 cup whole milk warmed
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper

Method

 

Prepare the Brisket

1. Pat the beef brisket dry with paper towels and season generously with salt, black pepper, and thyme.
2. Place the brisket in the slow cooker, fat side up.
3. Add the smashed garlic cloves around the meat, then pour in the red wine and beef broth until the liquid reaches about one-third up the sides of the brisket.
4. Cover and cook on low for 7 hours, or until the meat is fork-tender and easily pulls apart.

Make the Mashed Potatoes

1. While the brisket is cooking, place the peeled potatoes in a large pot and cover with cold water by about an inch.
2. Bring to a boil over high heat, then reduce to a simmer and cook for 15 to 20 minutes, until the potatoes are tender when pierced with a fork.
3. Drain the potatoes thoroughly and return them to the hot pot for a minute to let excess steam evaporate.
4. Mash the potatoes with butter, minced garlic, warm milk, salt, and pepper until smooth and creamy.
5. Keep the mashed potatoes warm on the warm setting of the slow cooker while you finish the brisket, stirring occasionally to prevent a skin from forming.

Final Check and Serve

1. Before serving, use a food thermometer to verify the brisket is cooked through to a safe internal temperature.
2. Spoon the mashed potatoes onto plates and top with slices or shredded brisket, drizzling with pan juices from the slow cooker.
3. Serve immediately while everything is still warm and tender.

Notes

For the brisket, tie it tightly with kitchen twine before placing it in the crock pot to help it cook evenly. When making the mashed potatoes, let the potatoes sit in warm water for 10 minutes after boiling to absorb more moisture, which gives them a creamier texture without needing extra butter or milk.

Food Safety Note: Always use a food thermometer to confirm your dish has reached a safe internal temperature before serving, and follow your country’s official food safety guidelines for meat, poultry, and slow-cooking. Cook times in this recipe are estimates — appliance and ingredient variation affects actual cook time.