Slow Cooker Pot Roast Mashed Potatoes

Featured in: Comfort Food Love

Savor hearty comfort with slow cooked beef chuck roast, carrots, celery, and onions bathed in a flavorful broth. The beef becomes melt-in-your-mouth tender after hours on low heat, paired with creamy, buttery mashed potatoes made from Yukon Gold or Russet varieties. Enjoy every bite with a ladle of rich gravy and a touch of fresh parsley. This satisfying dish is perfect for easy entertaining or weeknight family dinners, and can be customized with gluten-free ingredients or a splash of red wine for enhanced flavor.

Updated on Sat, 08 Nov 2025 08:03:00 GMT
Hearty slow cooker pot roast served with creamy mashed potatoes and fresh herbs.  Save
Hearty slow cooker pot roast served with creamy mashed potatoes and fresh herbs. | tastyeffect.com

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

I first made this pot roast for a big family gathering on a chilly weekend. The slow cooker did all the work and the aroma filled the house, making everyone eager for dinnertime.

Ingredients

  • For the Pot Roast: 3 lbs (1.4 kg) beef chuck roast, 1 tbsp kosher salt, 1 tsp black pepper, 2 tbsp olive oil, 1 large onion (sliced), 4 cloves garlic (minced), 4 large carrots (peeled and cut into 2-inch pieces), 3 celery stalks (cut into 2-inch pieces), 2 cups (480 ml) beef broth (gluten-free if needed), 2 tbsp tomato paste, 1 tbsp Worcestershire sauce (gluten-free if needed), 1 tsp dried thyme, 1 tsp dried rosemary, 2 bay leaves
  • For the Mashed Potatoes: 2 lbs (900 g) Yukon Gold or Russet potatoes (peeled and cut into chunks), 4 tbsp unsalted butter, ½ cup (120 ml) whole milk (plus more as needed), 1 tsp salt, ½ tsp black pepper
  • Optional Garnish: Chopped fresh parsley

Instructions

Prep the Beef:
Pat the beef chuck roast dry and season all sides with salt and pepper.
Sear and Transfer:
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.
Make 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 beef pot roast with carrots, celery, and rich gravy over buttery mashed potatoes.  Save
Tender beef pot roast with carrots, celery, and rich gravy over buttery mashed potatoes. | tastyeffect.com

My kids always get excited when this pot roast makes an appearance because they love piling the creamy mashed potatoes high and drizzling them with the savory gravy.

Required Tools

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

Allergen Information

Contains dairy from butter and milk. Use gluten-free ingredients for dietary restrictions, and be aware that Worcestershire sauce may include anchovies (fish).

Nutritional Information

Each serving provides approximately 520 calories, 23 g total fat, 36 g carbohydrates, and 44 g protein.

Savory slow cooker pot roast alongside smooth, fluffy mashed potatoes for the perfect meal. Save
Savory slow cooker pot roast alongside smooth, fluffy mashed potatoes for the perfect meal. | tastyeffect.com

This pot roast is perfect for Sunday supper or any special occasion when you want cozy, easy comfort food. Enjoy the leftovers in sandwiches or wraps the next day.

Recipe FAQ

What cut of beef works best?

Beef chuck roast is ideal for slow cooking, breaking down into juicy, tender meat.

Can I make this gluten-free?

Substitute gluten-free beef broth and Worcestershire sauce for a gluten-free meal.

How do I thicken the gravy?

Whisk cornstarch with cooking liquid and mix back into the slow cooker, then cook on high for 10 minutes.

Is it possible to use other potatoes?

Yukon Gold or Russet potatoes both produce creamy, fluffy mashed potatoes for this dish.

What wine pairs well with this meal?

A bold red wine, such as Cabernet Sauvignon, complements the rich flavors beautifully.

How do I get the beef extra brown?

Sear the beef roast in a skillet for 3–4 minutes per side before adding it to the slow cooker.

Slow Cooker Pot Roast Mashed Potatoes

Fork-tender beef with vegetables and creamy mashed potatoes topped with savory pan juices.

Prep duration
20 min
Cook duration
480 min
Complete duration
500 min
Created by Laura Bennett


Skill level Easy

Heritage American

Output 6 Portions

Dietary requirements No gluten

Components

Pot Roast

01 3 lbs 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 lbs Yukon Gold or Russet potatoes, peeled and cut into chunks
02 4 tablespoons unsalted butter
03 1/2 cup whole milk, plus more as needed
04 1 teaspoon salt
05 1/2 teaspoon black pepper

Optional Garnish

01 Chopped fresh parsley

Directions

Phase 01

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

Phase 02

Sear Meat: Heat olive oil in a large skillet over medium-high heat. Brown the roast thoroughly on every surface, approximately 3 to 4 minutes per side, then transfer the roast to the slow cooker.

Phase 03

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

Phase 04

Prepare Braising Liquid: Whisk together beef broth, tomato paste, Worcestershire sauce, dried thyme, dried rosemary, and bay leaves in a bowl. Pour mixture over the roast and vegetables.

Phase 05

Slow Cook: Cover and cook on low setting for 8 hours until the beef is exceptionally tender and can be pulled apart with a fork.

Phase 06

Prepare Potatoes: 40 minutes prior to serving, submerge potatoes in a large pot with cold water and 1 teaspoon salt. Bring to a boil, decrease heat, and simmer until potatoes are very tender, about 15 to 20 minutes.

Phase 07

Mash Potatoes: Drain potatoes thoroughly and return them to the pot. Add unsalted butter and whole milk, then mash until smooth and creamy. Season with salt and black pepper. Adjust milk to achieve preferred consistency.

Phase 08

Rest and Slice: Remove beef from the slow cooker and let it rest for 5 minutes. Discard bay leaves. Shred or slice the beef as desired.

Phase 09

Serve: Arrange portions of pot roast and vegetables over a bed of mashed potatoes. Spoon pan juices over the top. Garnish with fresh parsley if desired.

Necessary 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

Allergy details

Review each component for potential allergens and seek professional healthcare advice if uncertain.
  • Contains dairy from butter and milk.
  • Worcestershire sauce may include anchovies (fish).
  • Ensure all broth and Worcestershire ingredients are certified gluten-free for full compliance.
  • Always confirm product labels for potential allergens.

Nutritional information (per portion)

These values are approximate guides only and shouldn't replace professional medical consultation.
  • Energy: 520
  • Fats: 23 g
  • Carbohydrates: 36 g
  • Proteins: 44 g