Slow Cooker Roast Beef | One Pot Dinner

This Slow Cooker Roast Beef is the perfect winter dinner… one pot, plenty of vegetables and moist pull-apart roast beef that melts in your mouth.

This post is sponsored by Blackmores 

A roast beef cooked in the slow cooker with roast vegetables.

How long do you cook a roast beef in the slow cooker for?

If you’re after a really easy slow cooker beef roast recipe, then you’ve come to the right place! This classic recipe is cooked in the slow cooker for 8 hours (so you know the meat is going to absolutely delicious), plus you can add lots of vegetables to make it a simple one pot dinner.

Tender slow cooked roast beef that has been pulled apart.

Sear the beef before putting it in the slow cooker to get the best flavour possible

To get that amazing beef flavour, you’ll need to sear the beef in a frying pan before popping it into the slow cooker. I like to sear it for around 8-10 minutes on the highest possible heat so that you get a dark crust forming (this gives it an incredible amount of flavour and also locks in the moisture). Searing the beef is totally optional… but highly recommended for maximum flavour and texture. 

Roast beef and roast carrots, potatoes and celery that has been cooked in a slow cooker for 8 hours.

A one pot slow cooker roast beef dinner with vegetables

When I make slow cooker beef roast, I tend to just throw in any vegetables I have lying around (usually carrots, celery and potatoes). You can put all of the vegetables in the slow cooker for the entire cooking time (which I do if I’m going to be out all day), and this will give you very soft, fall-apart vegetables. But if you’re going to be home for a last couple of hours of the cooking time, I’d recommend popping the potatoes in with 3-4 hours to go (as this keeps them a bit firmer).

Shredded roast beef from the slow cooker.

Cooking a roast beef in the oven vs a slow cooker

For years I avoided cooking roast beef in the oven because it would always turn out dry. But cooking a roast beef in the slow cooker totally avoids that problem! It’s seriously faultless. I would never, ever go back to cooking beef roasts in the oven… not when it’s so easy (and yummy) in the slow cooker.

A family dinner made with beef and vegetables.

What makes Slow Cooker Roast Beef so good?

  • it’s a super easy midweek meal… pop it on in the morning and dinner will be ready and waiting for you!
  • it’s packed full of nutritious vegetables – winner!
  • slow cooking the beef will keep it deliciously tender 
  • red meat is a great source of Vitamin B which helps to reduce stress
  • it’s made in one pot… so there’s hardly any washing up!

Lots of vegetables surrounding slow cooker roast beef.

More simple slow cooker dinner recipes:

Happy slow cooking!!

This Slow Cooker Roast Beef is the perfect winter dinner... one pot, plenty of vegetables and moist pull-apart roast beef that melts in your mouth.

Slow Cooker Roast Beef

This Slow Cooker Roast Beef is the perfect winter dinner... one pot, plenty of vegetables and moist pull-apart roast beef that melts in your mouth.
3.2 from 5 votes
Print Pin Rate
Course: dinners, slow cooker
Cuisine: family dinners, slow cooker
Keyword: slow cooker roast beef
Prep Time: 15 minutes
Cook Time: 8 hours
Total Time: 8 hours 15 minutes
Servings: 6 serves
Calories: 688kcal
Author: Lucy Mathieson


  • 3 tbs olive oil
  • 1.5 kg beef chuck roast
  • salt and pepper, to season
  • 1 onion, diced
  • 4 tsp minced garlic (or 4 garlic cloves minced)
  • 4 carrots, roughly chopped
  • 4 celery stalks, roughly chopped
  • 4 large potatoes, peeled and quartered
  • 1/2 cup plain flour
  • 2 tbs chopped Italian herbs (parsley, oregano, rosemary etc)
  • 4 cups liquid beef stock


  • Heat the olive oil over high heat in a large frying pan. 
  • Season the beef chuck roast with salt and pepper and place into the pan. Cook on high heat for 8-10 minutes or until a dark crust has formed over the outside. 
  • Place the beef into the slow cooker. 
  • Cook the onion and garlic in the frying pan over medium-low heat until translucent. Add to the slow cooker. 
  • Add the chopped carrots, celery and potatoes (see note). 
  • Mix the plain flour and Italian herbs with 1 cup of the liquid beef stock and pour into the slow cooker. Add the remaining 3 cups of stock. 
  • Cook on low for 8 hours. 


If you cook the potatoes for the entire 8 hours, you'll end up with them falling apart (which a lot of people do enjoy!). But if you prefer, you can put them in with 3-4 hours remaining and they will stay firmer. 
Nutrition Facts
Slow Cooker Roast Beef
Amount Per Serving
Calories 688 Calories from Fat 324
% Daily Value*
Total Fat 36g 55%
Saturated Fat 13g 65%
Cholesterol 172mg 57%
Sodium 584mg 24%
Potassium 1978mg 57%
Total Carbohydrates 35g 12%
Dietary Fiber 6g 24%
Sugars 4g
Protein 56g 112%
Vitamin A 139.5%
Vitamin C 25.9%
Calcium 15.6%
Iron 64.5%
* Percent Daily Values are based on a 2000 calorie diet.

A slow cooker family dinner.


A classic roast beef and roast vegetables for an easy dinner.

Leave a Reply


2 Comment threads
2 Thread replies
Most reacted comment
Hottest comment thread
3 Comment authors
SarahLucy MathiesonSarah Recent comment authors
newest oldest most voted
Notify of

Hi Lucy, I’m making your roast beef in the slow cooker today. I bought a smaller piece of meat so only did 3 cups of stock. Will this be ok? Does the meat need to be covered?


What can i use instead of flour??