Slow Cooker Pot Roast Mashed

Featured in: Weeknight Dinners

Enjoy tender beef chuck roast slow-cooked with onion, garlic, carrots, and celery in a rich broth, finished with herbs. This dish is paired with creamy mashed Yukon Gold or Russet potatoes blended with butter and milk. Sear the beef before adding to the slow cooker for extra flavor, serve shredded or sliced over the smooth potatoes, keeping things hearty and comforting. Garnish with fresh parsley for color, and drizzle with savory pan juices to complete the experience. Simple prep and slow cooking make it perfect for easy gatherings, yielding six generous servings.

Updated on Sat, 08 Nov 2025 13:39:00 GMT
Tender Slow Cooker Pot Roast served over creamy mashed potatoes and rich gravy.  Pin
Tender Slow Cooker Pot Roast served over creamy mashed potatoes and rich gravy. | grillandbites.com

A classic comforting dish featuring tender beef pot roast slow-cooked with vegetables and rich gravy served alongside creamy mashed potatoes. This crowd-pleasing meal is perfect for family gatherings and cozy weeknight dinners.

I first made this pot roast for a holiday dinner and it became an instant family favorite. The aroma filled the house all day and everyone loved piling the gravy-drenched beef over mountains of potatoes.

Ingredients

  • Beef chuck roast: 3 lbs (1.4 kg), select a marbled cut for melt-in-your-mouth texture.
  • Kosher salt: 1 tbsp, for seasoning the beef and potatoes.
  • Black pepper: 1 tsp + ½ tsp for potatoes, adds depth and subtle heat.
  • Olive oil: 2 tbsp, use for searing the roast.
  • Onion: 1 large, sliced to sweeten the gravy.
  • Garlic: 4 cloves, minced for aromatic flavor.
  • Carrots: 4 large, peeled and cut into 2-inch pieces for color and sweetness.
  • Celery: 3 stalks, cut into 2-inch pieces adds savoriness.
  • Beef broth: 2 cups (480 ml), use gluten-free broth if needed.
  • Tomato paste: 2 tbsp, enriches the sauce.
  • Worcestershire sauce: 1 tbsp, adds umami (check for gluten-free).
  • Dried thyme: 1 tsp, for classic flavor.
  • Dried rosemary: 1 tsp, infuses earthy notes.
  • Bay leaves: 2, for depth of flavor.
  • Yukon Gold or Russet potatoes: 2 lbs (900 g), peeled and cut into chunks for mashed potatoes.
  • Unsalted butter: 4 tbsp, for creamy texture.
  • Whole milk: ½ cup (120 ml) plus more for consistency in mashed potatoes.
  • Chopped fresh parsley: Optional, garnish for freshness.

Instructions

Prepare beef:
Pat beef chuck roast dry and season on all sides with kosher salt and black pepper.
Sear the roast:
Heat olive oil in a large skillet over medium-high heat. Sear the roast on all sides until browned (about 3 to 4 minutes per side). Transfer to a slow cooker.
Add vegetables:
Arrange onion, garlic, carrots, and celery around the roast in the slow cooker.
Make the gravy blend:
In a bowl, whisk beef broth, tomato paste, Worcestershire sauce, thyme, rosemary, and bay leaves. Pour over the roast and vegetables.
Slow cook:
Cover slow cooker and cook on low for 8 hours until beef is fork-tender.
Make mashed potatoes:
Place potatoes in a large pot and cover with cold water. Add salt. Bring to a boil then simmer until potatoes are tender, 15 to 20 minutes. Drain, return to pot, add butter and milk, then mash until smooth and creamy. Season with salt and pepper. Add extra milk if needed.
Finish roast:
Remove beef from slow cooker and let rest for 5 minutes. Discard bay leaves. Shred or slice beef.
Serve:
Plate pot roast and vegetables over mashed potatoes. Drizzle with pan juices and garnish with parsley if desired.
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| grillandbites.com

Every time I serve this recipe my kids race to the table for seconds, especially on chilly evenings. The leftovers make amazing sandwiches for lunch the next day.

Serving Suggestions

This pot roast pairs well with roasted green beans, steamed peas, or a crisp garden salad for a complete meal.

Storage & Reheating

Store leftovers in airtight containers in the refrigerator for up to 3 days. Reheat gently in the microwave or on the stovetop with a splash of broth.

Ingredient Variations

You can swap out carrots and celery for parsnips or add mushrooms for extra savoriness. Russet potatoes can be replaced by sweet potatoes for a different twist.

Hearty Slow Cooker Pot Roast melts in your mouth, alongside buttery mashed potatoes.  Pin
Hearty Slow Cooker Pot Roast melts in your mouth, alongside buttery mashed potatoes. | grillandbites.com

This classic pot roast delivers unforgettable comfort every time. Enjoy the leftovers for a quick lunch or slice up for hearty sandwiches.

Recipe FAQ

What beef cut works best for this dish?

Beef chuck roast is ideal, delivering tender, flavorful results after slow cooking.

How can I thicken the pan juices?

Mix 1 tbsp cornstarch with some liquid from the slow cooker, return and cook on high until thickened.

Can I substitute potatoes types?

Yes, both Yukon Gold and Russet potatoes work well, yielding creamy mashed textures.

What wine pairs well with this meal?

Bold reds, such as Cabernet Sauvignon, nicely complement the savory flavors.

Is this dish gluten-free?

Use gluten-free broth and Worcestershire sauce to accommodate gluten-free diets.

Slow Cooker Pot Roast Mashed

Tender beef with vegetables paired with creamy potatoes makes a hearty classic for gatherings or weeknight dinners.

Prep duration
20 min
Cook duration
480 min
Overall duration
500 min


Skill level Easy

Heritage American

Output 6 Portions

Dietary requirements No gluten

Components

Pot Roast

01 3 pounds beef chuck roast
02 1 tablespoon kosher salt
03 1 teaspoon black pepper
04 2 tablespoons olive oil
05 1 large onion, sliced
06 4 cloves garlic, minced
07 4 large carrots, peeled and cut into 2-inch pieces
08 3 celery stalks, cut into 2-inch pieces
09 2 cups beef broth (gluten-free if needed)
10 2 tablespoons tomato paste
11 1 tablespoon Worcestershire sauce (gluten-free if needed)
12 1 teaspoon dried thyme
13 1 teaspoon dried rosemary
14 2 bay leaves

Mashed Potatoes

01 2 pounds Yukon Gold or Russet potatoes, peeled and cut into chunks
02 4 tablespoons unsalted butter
03 1/2 cup whole milk
04 1 teaspoon salt
05 1/2 teaspoon black pepper

Garnish

01 Chopped fresh parsley (optional)

Directions

Phase 01

Season Beef: Pat beef chuck roast dry with paper towels. Generously season all sides with kosher salt and black pepper.

Phase 02

Sear Roast: Heat olive oil in a large skillet over medium-high. Sear beef on all sides until deeply browned, about 3 to 4 minutes per side. Transfer browned beef to the slow cooker.

Phase 03

Add Vegetables: Scatter onion, minced garlic, carrots, and celery evenly around beef in the slow cooker.

Phase 04

Prepare Cooking Liquid: In a bowl, whisk beef broth, tomato paste, Worcestershire sauce, dried thyme, dried rosemary, and bay leaves. Pour mixture evenly over beef and vegetables.

Phase 05

Slow Cook Beef: Cover. Set slow cooker to low and cook for 8 hours until beef is tender and shreds easily with a fork.

Phase 06

Prepare Mashed Potatoes: 40 minutes before serving, place potatoes in a large pot. Cover with cold water; add salt. Bring to a boil, reduce heat, and simmer 15–20 minutes until very tender. Drain thoroughly and return potatoes to pot.

Phase 07

Mash Potatoes: Add butter and milk to potatoes. Mash until smooth and creamy. Season with salt and black pepper to taste. Add more milk for creamier consistency if needed.

Phase 08

Rest and Shred Beef: Carefully remove beef from the slow cooker. Let rest for 5 minutes. Discard bay leaves. Shred or slice beef to desired thickness.

Phase 09

Serve: Serve shredded beef and slow-cooked vegetables atop a bed of mashed potatoes. Spoon pan juices over and garnish with chopped fresh parsley if desired.

Tools needed

  • Slow cooker (6-quart or larger)
  • Large skillet
  • Chef's knife
  • Cutting board
  • Large pot
  • Potato masher or ricer
  • Measuring cups
  • Measuring spoons

Allergy details

Review each ingredient for potential allergens and consult healthcare providers if you're uncertain about any components.
  • Contains dairy (butter, milk), and Worcestershire sauce may contain anchovies (fish). Ensure beef broth and Worcestershire sauce are gluten-free if required. Always check ingredient labels for allergen cross-contact.

Nutrition breakdown (per portion)

These values are estimates only and shouldn't replace professional medical guidance.
  • Energy: 520
  • Fat: 23 g
  • Carbohydrates: 36 g
  • Protein: 44 g