Slow Cooker Pot Roast Mashed

Featured in: Hearty Dinners

This comforting dish features a tender slow-cooked beef pot roast seasoned with herbs and surrounded by savory vegetables. It’s accompanied by creamy mashed potatoes made from Yukon Gold or Russet potatoes blended with butter and milk until smooth. The rich gravy formed from the cooking juices enhances the dish’s hearty flavors. Perfect for an easy, satisfying main course with a classic American flair.

Updated on Sat, 15 Nov 2025 08:50:00 GMT
Tender slow cooker pot roast with carrots, a savory family meal atop mashed potatoes. Pin
Tender slow cooker pot roast with carrots, a savory family meal atop mashed potatoes. | kitchenprairie.com

A classic, comforting dish featuring tender beef pot roast slow-cooked with vegetables and rich gravy, served alongside creamy mashed potatoes.

I remember the first chilly weekend I tried this recipe: the hearty aroma filled my home and made everyone eagerly anticipate dinnertime. It always brings warmth and nostalgia, especially when shared with family or friends.

Ingredients

  • Beef chuck roast: 3 lbs (1.4 kg)
  • Kosher salt: 1 tbsp
  • Black pepper: 1 tsp
  • Olive oil: 2 tbsp
  • Onion: 1 large, sliced
  • Garlic: 4 cloves, minced
  • Carrots: 4 large, peeled and cut into 2-inch pieces
  • Celery: 3 stalks, cut into 2-inch pieces
  • Beef broth: 2 cups (480 ml, gluten-free if needed)
  • Tomato paste: 2 tbsp
  • Worcestershire sauce: 1 tbsp (gluten-free if needed)
  • Dried thyme: 1 tsp
  • Dried rosemary: 1 tsp
  • Bay leaves: 2
  • Yukon Gold or Russet potatoes: 2 lbs (900 g), peeled and cut into chunks
  • Unsalted butter: 4 tbsp
  • Whole milk: ½ cup (120 ml, plus more as needed)
  • Salt (for potatoes): 1 tsp
  • Black pepper (for potatoes): ½ tsp
  • Optional garnish: Chopped fresh parsley

Instructions

Prep and Season the Beef:
Pat the beef chuck roast dry and season all sides with salt and pepper.
Sear the Roast:
In a large skillet, heat olive oil over medium-high heat. Sear the roast on all sides until browned (about 3–4 minutes per side). Transfer to the slow cooker.
Add Vegetables:
Add onion, garlic, carrots, and celery around the roast in the slow cooker.
Mix Liquid Ingredients:
In a bowl, whisk together beef broth, tomato paste, Worcestershire sauce, thyme, rosemary, and bay leaves. Pour over the roast and vegetables.
Slow Cook:
Cover and cook on low for 8 hours, or until the beef is fork-tender.
Prepare Mashed Potatoes:
About 40 minutes before serving, place potatoes in a large pot and cover with cold water. Add 1 tsp salt. Bring to a boil, reduce heat, and simmer until potatoes are very tender (15–20 minutes). Drain well and return potatoes to the pot. Add butter and milk; mash until smooth and creamy. Season with salt and pepper to taste. Add more milk if needed for desired consistency.
Finish the Roast:
Remove the roast from the slow cooker and let rest for 5 minutes. Discard bay leaves. Shred or slice the beef.
Serve:
Serve pot roast and vegetables over a bed of mashed potatoes. Drizzle with pan juices and garnish with fresh parsley if desired.
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Sharing this meal with my family always sparks stories of comfort and togetherness. The leftovers rarely last, especially when everyone goes for seconds!

Required Tools

Recommended tools include a slow cooker (6-quart or larger), large skillet, chefs knife, cutting board, large pot, potato masher or ricer, and measuring cups and spoons.

Allergen Information

This recipe contains dairy from butter and milk, and anchovies in Worcestershire sauce. It can be made gluten-free with the right broth and sauce choices—always check labels for allergens.

Nutritional Information

Per serving: 520 calories, 23 g total fat, 36 g carbohydrates, and 44 g protein.

Fork-tender beef pot roast, richly sauced, served alongside fluffy, creamy mashed potatoes for dinner. Pin
Fork-tender beef pot roast, richly sauced, served alongside fluffy, creamy mashed potatoes for dinner. | kitchenprairie.com

This pot roast is sure to be a family favorite and makes hearty leftovers. Serve with your favorite veggies and enjoy comfort in every bite.

Recipe Questions & Answers

How do I ensure the beef is tender?

Cook the beef on low heat for 8 hours to allow the connective tissues to break down, resulting in a tender, fork-ready texture.

What type of potatoes work best for the mashed side?

Yukon Gold potatoes provide a creamy, buttery texture, but Russet potatoes are also suitable for smooth mashed potatoes.

Can I thicken the gravy?

Yes, remove some cooking liquid and whisk it with cornstarch, then stir back into the slow cooker and cook on high for 10 minutes to thicken.

Is it necessary to sear the beef before slow cooking?

Searing the beef creates a browned crust that enhances flavor and texture before slow cooking.

Are there any suitable substitutions for the broth?

Red wine can be used to replace half of the broth to add richness and depth to the dish.

Slow Cooker Pot Roast Mashed

Comforting slow-cooked beef with vegetables and creamy mashed potatoes, perfect for a hearty meal.

Prep duration
20 min
Cook duration
480 min
Complete duration
500 min


Skill level Easy

Heritage American

Output 6 Portions

Diet specifications Without gluten

Components

Pot Roast

01 3 lbs beef chuck roast
02 1 tbsp kosher salt
03 1 tsp ground black pepper
04 2 tbsp 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 gluten-free beef broth
10 2 tbsp tomato paste
11 1 tbsp gluten-free Worcestershire sauce
12 1 tsp dried thyme
13 1 tsp dried rosemary
14 2 bay leaves

Mashed Potatoes

01 2 lbs Yukon Gold or Russet potatoes, peeled and chunked
02 4 tbsp unsalted butter
03 ½ cup whole milk
04 1 tsp salt
05 ½ tsp ground black pepper

Optional Garnish

01 Chopped fresh parsley

Directions

Phase 01

Season the Beef: Pat the beef chuck roast dry and evenly season all sides with kosher salt and black pepper.

Phase 02

Sear the Roast: Heat olive oil in a large skillet over medium-high heat. Sear the roast on all sides until browned, approximately 3–4 minutes per side, then transfer it to the slow cooker.

Phase 03

Add Vegetables: Arrange sliced onion, minced garlic, carrots, and celery around the roast inside the slow cooker.

Phase 04

Combine and Pour Broth Mixture: In a bowl, whisk together beef broth, tomato paste, Worcestershire sauce, dried thyme, dried rosemary, and bay leaves. Pour this mixture evenly over the roast and vegetables.

Phase 05

Cook the Roast: Cover and cook on low heat for 8 hours until the beef is fork-tender.

Phase 06

Prepare Mashed Potatoes: About 40 minutes before serving, place peeled potato chunks in a large pot and cover with cold water. Add 1 tsp salt. Bring to a boil, then reduce heat and simmer until very tender, about 15–20 minutes. Drain thoroughly.

Phase 07

Mash Potatoes: Return drained potatoes to the pot. Add unsalted butter and whole milk, then mash until smooth and creamy. Season with salt and pepper to taste, adding additional milk if needed for desired consistency.

Phase 08

Rest and Slice Roast: Remove the roast from the slow cooker and let it rest for 5 minutes. Discard bay leaves, then shred or slice the beef.

Phase 09

Serve: Arrange pot roast and vegetables over mashed potatoes, drizzle with pan juices, and garnish with chopped fresh parsley if desired.

Necessary tools

  • 6-quart or larger slow cooker
  • Large skillet
  • Chef's knife and cutting board
  • Large pot
  • Potato masher or ricer
  • Measuring cups and spoons

Allergy details

Review each component for potential allergens and consult with healthcare professionals if you're uncertain.
  • Contains dairy: butter and whole milk
  • Worcestershire sauce may contain anchovies (fish)
  • Gluten-free if using gluten-free broth and sauce
  • Verify products for allergen content

Nutrient content (each portion)

This data is offered as a general guide and isn't a substitute for professional medical guidance.
  • Energy: 520
  • Fat: 23 g
  • Carbohydrates: 36 g
  • Protein: 44 g