This Slow Cooker Steak with Onions takes just 15 minutes to prepare.
Made with caramelized onions and slow cooked to perfection in a savory broth, this mouthwatering steak recipe is sure to please.

What you will read about in this recipe.
What is Steak with Caramelized Onions?
Steak with caramelized onions combines together the savory flavor of perfectly slow cooked steak with the sweet with a hint of tang flavor of caramelized onions.
I like how easy this delicious steak recipe is for about any level of expertise to make.
Have you tried my Air Fryer Porterhouse Steak
That Air Fryer Porterhouse Steak is about the easiest and quickest way to make a tender and juicy steak.
Both this recipe for slow cooked steak and that recipe for air fryer steak are great tasting steak recipes that can be conveniently made.
Beef broth is an essential ingredient in making a juicy slow cooked steak. You can find beef broth here.
Why we love slow cooked steak.
Using a slow cooker to make this recipe allows for the steak to be infused with rich flavors from a slow simmer in a savory broth. The caramelized onions are a perfect complement to that tender and juice steak .
Here is what else we like about this recipe.
- This recipe can turn an inexpensive steak into a meal that rivals the expensive ones thanks to the slow cooking in broth.
- Prep work for this recipe takes about 15 minutes.
- Clean up is a breeze since we are slow cooking the ingredients in one pot.
- Personalizing this recipe is as easy as swapping out the seasonings with seasonings of your choice or adding vegetables such as peas or mushrooms.
- This recipe tastes great when served over rice or cooked pasta.
- Leftovers taste great as is or in a wrap or on a bun.
Ingredients needed to make Crock Pot Steak with Onions.
- Steaks. Chuck or round steak work well in this recipe.
- Salt and Pepper. Used to season the steak before searing.
- Olive Oil. Used for searing the steak and for sauteing.
- Onions. Sliced very thin.
- Garlic. Your garlic should be minced.
- Beef Broth. A low sodium beef broth can be used.
- Worcestershire Sauce Adds a nice flavor to the broth.
- Balsamic Vinegar Used for tenderizing and for adding a bit of flavor to the broth.
- Tomato Paste. For flavor and texture.
- Seasonings. Dried Thyme, Dried Rosemary, and salt and pepper to taste.
- Cornstarch. This is an optional ingredient that can be used for thickening the juice.
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Tips for making the best slow cooker steak.
The best kinds of steaks to use in this recipe are the ones that have good amount of marbling and connective tissue as they can easily withstand a slow cooking process. Steaks such as chuck, round, sirloin tip, and flank can cook well in a slow cooker.
More helpful tips for you.
- Searing your steak is the first step in this recipe to add depth of flavor to the final dish. This process takes about eight minutes.
- After removing your steak from the skillet used to sear it in, you can caramelize your onions.
- Yellow onions work best in caramelizing when it comes to flavor.
- Make sure that your onion is sliced uniformly thin for even caramelizing and to prevent burning them.
- Olive oil is used in this recipe for caramelizing however, butter can be used for an even richer flavor.
- If your broth seems to be too thin while slow cooking you can take the cover off the slow cooker during the last half hour of slow cooking. To thin out the broth you can simply add a small amount of additional beef broth.
How to make Slow Cooker Steak with Onions
Prep Time: 15 minutes .
Slow Cook Time : 6 to 8 hours on low. .
Servings: 4 .
- Steak. Use a clean paper towel to dab off any moisture from your steaks. Then gently sprinkle salt and pepper on both sides of each steak.
- Sear. Heat your olive oil in a large skillet on medium high heat for one minute. Then brown the steaks on both sides (about three and a half minutes per side). Depending on the size of your skillet, you may need to do this in batches. Transfer the browned steaks to your slow cooker.
- Sauté. In the same skillet used for searing, saute your sliced onions and garlic until the onions have caramelized (about eight to ten minutes). Then evenly spread these ingredients over your steaks.
- Sauce. In a large mixing bowl use a whisk to combine together the broth, Worcestershire sauce, balsamic vinegar, tomato paste, dried thyme, and dried rosemary. Then pour these ingredients over the ingredients in the slow cooker.
- Slow Cook. Cover your slow cooker and cook the ingredients on low for six to eight hours, or until the steak is tender enough to easily shred with a fork. You can stir the ingredients occasionally while slow cooking.
Expert Tip 👉 For a thicker sauce, remove about ¼ cup of the cooking liquid from the slow cooker and whisk it with cornstarch until smooth. Stir the mixture back into the slow cooker and let it cook for an additional 10-15 minutes until thickened.
How to Store Slow Cooker Steak.
Once your steak has fully cooled it can be stored in an airtight container. When properly stored, it can keep for up to four days refrigerated or up to a few months when frozen.
You may also be interested in these slow cooker recipes.
- Slow Cooker Enchilada Soup Recipe
- Slow Cooker Smoked Beef Brisket
- Crockpot Potatoes Au Gratin
- Crockpot Angel Chicken Pasta
- Crockpot Funeral Potatoes Recipe
- Crockpot Bourbon Chicken (Slow Cooker) Recipe
Print the recipe for Slow Cooker Steak with Onions
Slow Cooker Steak with Onions
Equipment
Ingredients
- 24 oz Steaks. -- 4 steaks 6 ounces each, Chuck or round steak work well in this recipe.
- 2 teaspoon Salt
- 2 teaspoon Pepper.
- 2 tablespoon Olive Oil.
- 2 Onions. --Sliced very thin.
- 4 cloves Garlic. --minced.
- 2 cups Beef Broth.
- 2 tablespoon Worcestershire Sauce
- 2 tablespoon Balsamic Vinegar
- 2 tablespoon Tomato Paste.
- 1 teaspoon Dried Thyme
- 1 teaspoon Dried Rosemary
- 1 tablespoon Cornstarch. --optional ingredient
Instructions
- Steak. Use a clean paper towel to dab off any moisture from your steaks. Then gently sprinkle salt and pepper on both sides of each steak.
- Sear. Heat your olive oil in a large skillet on medium high heat for one minute. Then brown the steaks on both sides (about three and a half minutes per side). Depending on the size of your skillet, you may need to do this in batches. Transfer the browned steaks to your slow cooker.
- Sauté. In the same skillet used for searing, saute your sliced onions and garlic until the onions have caramelized (about eight to ten minutes). Then evenly spread these ingredients over your steaks.
- Sauce. In a large mixing bowl use a whisk to combine together the broth, Worcestershire sauce, balsamic vinegar, tomato paste, dried thyme, and dried rosemary. Then pour these ingredients over the ingredients in the slow cooker.
- Slow Cook. Cover your slow cooker and cook the ingredients on low for six to eight hours, or until the steak is tender enough to easily shred with a fork. You can stir the ingredients occasionally while slow cooking.
Recipe Notes
Also, please see the actual recipe post for further details on this recipe. Nutritional Information is only an estimate and can vary especially with ingredients that are used. See theairfryingdiva.com for details on this recipe.
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Nutrition
Please note: Nutritional data has been calculated using a tool that comes with this recipe card and not by me. This means that Nutritional Information is only an estimate and can vary especially with ingredients that you use. The accuracy of this tool may differ from other tools as expected. Also note that there is no instructional value to the video that may be attached to this recipe. It is only there for visual pleasure. For more information about the images in this recipe, please refer the the recipe instructions. Thank you!
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Slow Cooker Steak with Onions, a delicious and easy dinner recipe made with caramelized onions and slow cooked to perfection in savory broth.
Please see recipe post for further details on this recipe.
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