Slow Cooker Pot Roast

Featured in: One-Pot Comfort Dishes

This classic dish features succulent beef chuck gently cooked until tender alongside savory vegetables. The rich broth blends flavors of garlic, thyme, and rosemary, creating a deep, comforting profile. Served with creamy mashed potatoes made from Yukon Gold or Russet potatoes, butter, and milk, it offers a satisfying texture contrast. The slow cooking method ensures juicy meat that shreds easily, complemented by fresh parsley for brightness. Ideal for an easy, hearty dinner to warm the table.

Updated on Sun, 09 Nov 2025 11:59:00 GMT
Slow Cooker Pot Roast with Mashed Potatoes served with rich, savory gravy and fresh parsley.  Save
Slow Cooker Pot Roast with Mashed Potatoes served with rich, savory gravy and fresh parsley. | sizzlebloom.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 time I made this slow cooker pot roast for a Sunday dinner. The smell alone brought everyone to the kitchen, and the perfectly tender beef was an instant hit with my family.

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
  • Chopped fresh parsley: Optional garnish

Instructions

Season and Sear:
Pat the beef chuck roast dry and season all sides with salt and pepper. 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 and Pour:
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 and Serve:
Remove the roast from the slow cooker and let rest for 5 minutes. Discard bay leaves. Shred or slice the beef. Serve pot roast and vegetables over a bed of mashed potatoes. Drizzle with pan juices and garnish with fresh parsley if desired.
Tender slow-cooked pot roast accompanied by creamy mashed potatoes and hearty vegetables.  Save
Tender slow-cooked pot roast accompanied by creamy mashed potatoes and hearty vegetables. | sizzlebloom.com

Sharing this meal brings back fond memories around our dinner table. Seeing everyone reach for seconds always makes the slow cooking so worthwhile.

Required Tools

Slow cooker (6-quart or larger), large skillet, chef's knife, cutting board, large pot, potato masher or ricer, measuring cups and spoons

Allergen Information

Contains dairy (butter, milk). Worcestershire sauce may contain anchovies (fish). Gluten-free if using gluten-free beef broth and Worcestershire sauce. Always verify ingredient labels for allergens.

Nutritional Information

Per serving: Calories 520, Total Fat 23 g, Carbohydrates 36 g, Protein 44 g

Hearty Slow Cooker Pot Roast with Mashed Potatoes, perfect for a comforting family dinner. Save
Hearty Slow Cooker Pot Roast with Mashed Potatoes, perfect for a comforting family dinner. | sizzlebloom.com

This slow cooker pot roast is sure to become a family favorite for cozy nights in. Enjoy every tender bite and savor the leftovers the next day!

Common Questions

What cut of beef is best for slow cooking?

Beef chuck roast is ideal due to its marbling, which breaks down during long cooking, resulting in tender, flavorful meat.

Can I use Russet potatoes for mashed potatoes?

Yes, Russet potatoes create fluffy mashed potatoes, though Yukon Gold offers a creamier texture and buttery flavor.

How do I make the gravy thicker?

Remove half a cup of cooking liquid, whisk with cornstarch, then stir back and cook on high until thickened.

What herbs enhance the flavor of the pot roast?

Dried thyme, rosemary, and bay leaves add aromatic depth and complement the beef and vegetables perfectly.

Is it necessary to sear the beef before slow cooking?

Searing the beef locks in juices and adds a rich, caramelized flavor that enhances the final dish.

Can I substitute the beef broth for another liquid?

Red wine can be used instead of part of the broth to add complexity and deepen the flavor.

Slow Cooker Pot Roast

Hearty slow-cooked beef with vegetables paired with creamy mashed potatoes for a comforting meal.

Setup Duration
20 min
Heat Duration
480 min
Complete Duration
500 min
Created by Emily Dawson

Classification One-Pot Comfort Dishes

Skill Level Easy

Heritage American

Output 6 Portions

Nutrition Labels No Gluten

Components

Pot Roast

01 3 lbs beef chuck roast
02 1 tbsp kosher salt
03 1 tsp 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 beef broth (gluten-free if needed)
10 2 tbsp tomato paste
11 1 tbsp Worcestershire sauce (gluten-free if needed)
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 cut into chunks
02 4 tbsp unsalted butter
03 ½ cup whole milk (plus more as needed)
04 1 tsp salt
05 ½ tsp black pepper

Optional Garnish

01 Chopped fresh parsley

Method Steps

Phase 01

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

Phase 02

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

Phase 03

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

Phase 04

Prepare and Add Liquid Mixture: Whisk together beef broth, tomato paste, Worcestershire sauce, dried thyme, dried rosemary, and bay leaves in a bowl, then pour evenly over roast and vegetables.

Phase 05

Slow Cook the Roast: Cover slow cooker and cook on low heat for 8 hours, or until roast is fork-tender.

Phase 06

Cook the Potatoes: About 40 minutes before serving, place potatoes in a large pot, cover with cold water, add 1 tsp salt; bring to a boil, reduce heat, and simmer until tender, approximately 15–20 minutes. Drain thoroughly.

Phase 07

Mash the Potatoes: Return drained potatoes to the pot, add unsalted butter and whole milk, then mash until smooth and creamy. Adjust seasoning with salt and black pepper; add additional milk to achieve desired consistency.

Phase 08

Rest and Slice the Roast: Remove roast from slow cooker, discard bay leaves, and let rest for 5 minutes. Shred or slice beef as preferred.

Phase 09

Plate and Serve: Serve sliced pot roast and vegetables atop a bed of mashed potatoes. Drizzle with pan juices and garnish with chopped fresh parsley if desired.

Kitchen Tools

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

Dietary Alerts

Always review ingredients individually for potential allergens and seek professional medical guidance when uncertain.
  • Contains dairy from butter and milk.
  • Worcestershire sauce may contain anchovies (fish).
  • Gluten-free only if gluten-free broth and Worcestershire sauce are used.

Dietary Information (per portion)

Values shown are estimates and shouldn't replace professional medical consultation.
  • Energy Value: 520
  • Fats: 23 g
  • Carbohydrates: 36 g
  • Proteins: 44 g