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Mushroom Sauce over pasta. #vegetarian #healthydinner #dinnerideas #mushrooms

Heavenly Mushroom Sauce

This is the sauce that'll make you weak in the knees!  My Heavenly Mushroom Sauce is thick, rich, and irresistible. The mushrooms are seared with onions and garlic until they are a perfect deep brown color and salty, nutty, earthy flavor.  Thyme brings in more earthiness and a fantastic herbed backdrop.  Then vegetable broth is added to create the start of a delicious sauce.  Finally, a cornstarch slurry is whisked in to thicken it up to a glorious silky, and gluten-free creamy finish! #dinnerideas #vegetariandinners #vegetarianrecipes #healthydinners #familydinners

Course Main Course
Cuisine American
Keyword mushrooms, vegetarian
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 4 servings
Author Carrie Tyler


  • 10 oz White Button Mushrooms
  • 1 Small Onion (or 1/2 cup diced)
  • 1/2 Clove Garlic (or 1/2 tsp minced)
  • 1/2 tsp Dried Thyme, crushed
  • 1/2 tsp Salt
  • 1/2 tsp Ground Black Pepper
  • 1 cup Vegetable Broth
  • 1 tbsp Cornstarch heaping
  • 1/2 cup Milk


Prep-Ahead Steps

  1. Slice the mushrooms. Dice the onions. Mince the garlic.

    Sliced mushrooms for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms


  1. Preheat a large skillet and drizzle or spray with extra virgin olive oil.

  2. Add the onions, garlic, mushrooms, and thyme to the skillet and stir to mix together. Then spread out into a layer so as many mushrooms as possible are touching the skillet bottom.

    Sliced Mushrooms in skillet for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms
  3. Let sit without stirring for about 3-4 minutes until the mushrooms get a beautiful browned sear. Then stir so that the other side of as any mushrooms as possible get a sear.

    Seared sliced Mushrooms in skillet for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms
  4. Add a pinch of salt and ground black pepper and let the mushrooms cook down for another 5 minutes.

  5. While the mushrooms are cooking, making the slurry by mixing the cornstarch into the cold milk until completely dissolved.

    Adding cornstarch to milk for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms
  6. Add the Vegetable broth and stir to scrape up all of the browned bits from the bottom.

    Adding broth to cooked sliced Mushrooms in skillet for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms
  7. Add the cornstarch slurry, as this is the thickener. Whisk to ensure you don't get any clumps. It will thicken pretty fast. Bring back to a light simmer for 5 minutes.

    Adding slurry to cooked sliced Mushrooms in skillet for this Heavenly Mushroom Sauce Recipe. #vegetarian #healthydinner #dinnerideas #mushrooms
  8. Serve and enjoy!!

    Beyond burgers in mushroom sauce in skillet for Vegetarian Salisbury Steak with a thick, creamy, rich Mushroom Sauce. #vegetarian #healthydinner #dinnerideas #mushrooms

Recipe Notes

  1. For the Mushrooms, you can use cremini mushrooms as well.
  2. I used vegetable broth, but any broth will work in this recipe.
  3. I used Beyond Burger Patties, but you can certainly use any veggie burger you prefer.  You can also use real beef.  Simply form the ground beef into into a burger patty as you would normally.  Sear it on both sides in the skillet and then let it cook 90% of the way done.  Remove the patties to continue the recipe.