Slow Cooker Pot Roast Mashed Potatoes

Featured in: Midwest Hearty Meals

Enjoy a comforting meal featuring slow-cooked beef chuck roast, paired with carrots, celery, and onion, all simmered in a savory gravy. Fork-tender beef is served on a bed of smooth, buttery mashed potatoes, perfect for soaking up pan juices. Classic herbs like thyme and rosemary add depth, while a final garnish of fresh parsley completes the dish. This hearty preparation is both easy to make and deeply flavorful, suitable for family dinners or casual gatherings. Make it gluten-free by choosing appropriate broth and Worcestershire sauce. For added richness, a splash of red wine is welcome.

Updated on Sat, 08 Nov 2025 15:05:00 GMT
Hearty Slow Cooker Pot Roast with Mashed Potatoes served on a rustic plate.  Save to Pinterest
Hearty Slow Cooker Pot Roast with Mashed Potatoes served on a rustic plate. | yummywithmia.com

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

The first time I made this slow cooker pot roast for my family, the aroma filled our home and everyone was excited to sit down together. The roast was so tender, and the mashed potatoes soaked up all the delicious gravy.

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
  • Potatoes (Yukon Gold or Russet): 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 the Beef:
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 until browned on all sides, about 3 to 4 minutes per side. Transfer to the slow cooker.
Add Vegetables:
Arrange onion, garlic, carrots, and celery around the roast in the slow cooker.
Make the Sauce:
Whisk beef broth, tomato paste, Worcestershire sauce, thyme, rosemary, and bay leaves together. Pour over the roast and vegetables.
Slow Cook:
Cover and cook on low for 8 hours, or until the beef is fork-tender.
Begin Mashed Potatoes:
About 40 minutes before serving, place potatoes in a large pot, cover with cold water, and add 1 tsp salt.
Boil and Mash:
Bring to a boil, reduce heat, and simmer until potatoes are very tender, about 15 to 20 minutes. Drain well and return to the pot. Add butter and milk; mash until smooth and creamy. Season with salt and pepper. Add more milk for desired consistency if needed.
Finish Pot Roast:
Remove roast from the slow cooker and let rest for 5 minutes. Discard bay leaves. Shred or slice beef.
Serve:
Serve pot roast and vegetables over mashed potatoes. Drizzle with pan juices and garnish with fresh parsley if desired.
Tender beef pot roast slowly cooked to perfection with rich gravy and veggies.  Save to Pinterest
Tender beef pot roast slowly cooked to perfection with rich gravy and veggies. | yummywithmia.com

This pot roast has become a Sunday tradition; my kids look forward to helping whip the potatoes and everyone always wants a second helping.

Required Tools

Slow cooker (6-quart or larger), large skillet, chefs 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

Calories: 520, Total Fat: 23 g, Carbohydrates: 36 g, Protein: 44 g (per serving)

Creamy mashed potatoes complement savory Slow Cooker Pot Roast garnished with fresh parsley. Save to Pinterest
Creamy mashed potatoes complement savory Slow Cooker Pot Roast garnished with fresh parsley. | yummywithmia.com

This pot roast is pure comfort food. Leftovers reheat beautifully for another easy meal!

Common Recipe Questions

What cut of beef works best?

Beef chuck roast is ideal for slow cooking, yielding tender, flavorful results.

Can I make this gluten-free?

Yes, use gluten-free beef broth and Worcestershire sauce to keep the dish gluten-free.

Which potatoes are best for creamy mashed potatoes?

Yukon Gold potatoes provide a buttery texture, but Russet potatoes also work well.

How can I thicken the gravy?

Remove ½ cup cooking liquid, mix with 1 tbsp cornstarch, return to slow cooker, and cook on high for 10 minutes.

Can I add wine for flavor?

Substitute ½ cup of beef broth with red wine for a deeper, richer taste.

Is dairy required in the mashed potatoes?

Traditional preparation uses butter and milk, but plant-based alternatives can be substituted as desired.

Slow Cooker Pot Roast Mashed Potatoes

Tender beef slow-cooked with veggies, paired with creamy mashed potatoes for classic comfort.

Prep Time
20 minutes
Cooking Duration
480 minutes
Overall Time
500 minutes
Created by Mia

Recipe Type Midwest Hearty Meals

Skill Level Easy

Culinary Origin American

Total Output 6 Portion Size

Dietary Preferences Gluten-Free

What You'll Need

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 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 1/2 cup whole milk (plus more as needed)
04 1 tsp salt
05 1/2 tsp ground black pepper

Optional Garnish

01 Chopped fresh parsley

Steps to Follow

Step 01

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

Step 02

Sear Roast: Heat olive oil in a large skillet over medium-high. Brown roast on all sides, approximately 3–4 minutes per side. Transfer beef to slow cooker.

Step 03

Add Aromatics and Vegetables: Arrange onion, garlic, carrots, and celery around beef in slow cooker.

Step 04

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

Step 05

Slow Cooker Braise: Cover and cook on low for 8 hours until beef is fork-tender.

Step 06

Mashed Potatoes Preparation: About 40 minutes before serving, add potatoes to a large pot and cover with cold water. Include 1 tsp salt. Bring to boil, reduce heat, and simmer until potatoes are very tender, about 15–20 minutes.

Step 07

Mash Potatoes: Drain potatoes and return to pot. Add unsalted butter and whole milk. Mash until smooth and creamy. Season with salt and black pepper to taste. If desired, add extra milk for preferred consistency.

Step 08

Rest and Serve Beef: Remove beef from slow cooker, discard bay leaves. Allow meat to rest for 5 minutes before shredding or slicing.

Step 09

Plate and Garnish: Serve spoonfuls of pot roast and vegetables over mashed potatoes. Spoon pan juices on top and garnish with fresh parsley if desired.

Tools Required

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

Allergy Warnings

Please review individual ingredients for potential allergens and reach out to a healthcare professional if unsure.
  • Contains dairy: butter and milk included in mashed potatoes.
  • Worcestershire sauce may contain anchovies (fish allergen).
  • Use gluten-free broth and Worcestershire sauce if gluten avoidance is required.

Nutritional Info (per serving)

These details are for reference only and shouldn't replace professional medical consultation.
  • Calories Count: 520
  • Fats: 23 grams
  • Carbohydrates: 36 grams
  • Proteins: 44 grams