Slow Cooker Beef Brisket with mushrooms and onions
Beef, Main Courses - meat

Slow Cooker Brisket with mushrooms and onions

Slow Cooker Beef Brisket with mushrooms and onions: easy, moist, tender and oh so tasty!

Slow Cooker Beef Brisket
I had a lovely little brisket I picked up on clearance just waiting to be turned into something delicious, but it was ridiculously hot outside. Which means it’s time to break out the slow cooker.

I didn’t want to go with a Barbecue Brisket. I wasn’t in the mood for sweet. So a little hunting around on Yummly and I had enough inspiration to put together this.

Any time you cook a roast in a slow cooker you want to brown it a bit first for color and extra flavor. Be sure to deglaze the pan to get all of those yummy bits.

browning brisket in pan

In this method, he meat doesn’t boil, instead it sits on top of the onions and cooks in a nice moist smoke flavored heat.

brisket and onions in slow cooker

Cook for 3-4 hours on high. Slice it against the grain.

sliced brisket

Then thicken the juices a bit and serve with the onions and mushrooms. Well, for me anyway. The guys both ate it with plain gravy. And they both wished there was more. That’s high praise in my house.

Slow Cooker Beef Brisket with mushrooms and onions

Slow Cooker Beef Brisket

Prep time10 minutes
Cook time4 hours
Total time4 hours, 10 minutes
Meal type Beef, Meat Dishes
Occasion Summer, Winter
Slow Cooker Beef Brisket with mushrooms and onions. Tender and moist, serve with a simple gravy from the juices.


  • 2-3lb flat cut beef brisket
  • 2-3 tablespoons garlic pepper
  • 1 tablespoon olive oil
  • 2-3 onions (sliced)
  • 1/2lb mushrooms (sliced)
  • 1/2 cup chicken or beef broth
  • 1 teaspoon liquid smoke
  • 1 tablespoon cornstarch


A larger brisket will take an hour or two longer to cook depending on your crock pot.


Heat a large skillet (preferably cast iron) on medium high heat. Add oil.
While the pan is heating, rub brisket with garlic powder on both sides. Quickly brown the brisket on both sides in the skillet, about 3-4 minutes a side.
browning brisket in pan
While brisket is browning, layer onions and mushrooms on the bottom of the slow cooker.
Move brisket to slow cooker on top of the onions.
Pour the broth and liquid smoke into the skillet and stir with a wooden spoon to loosen any browned bits. Pour the liquid into the slow cooker on the side of the meat, not on top of it. You want the juices and onions on the bottom and the meat on top out of the liquid.
brisket and onions in slow cooker
Cook 3-4 hours on high, or 5-6 on low, depending on your slow cooker.
Remove brisket to cutting board and tent with foil.
Pour juices into a small saucepan and whisk in cornstarch. Bring to a boil and boil for 1 minute. Add cooked onions and mushrooms.
Slice brisket against the grain. Serve with gravy.
sliced brisket

Until next time, happy eating.

5 thoughts on “Slow Cooker Brisket with mushrooms and onions”

  1. Hi Audrey,
    Wow, my husband would love this recipe! Where do you find ‘liquid smoke’? I have never purchased that before. Do you use it for any other recipes? Could you make this without it?
    Thanks for partying with us at the TALENTED TUESDAY link party!
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