Dinner/ Salad/ Side dish

Keto mushrooms in oven with hazelnuts

Picture of a bowl with cauliflower mash with roasted mushrooms and hazelnuts with arugula

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Keto mushrooms in oven with hazelnuts is delicious keto vegetarian meal or great low carb side dish.

Mushrooms in oven with hazelnuts and arugula are super easy to prepare. Literally you just need to cut mushrooms and crush some hazelnuts. Throw everything in the oven with some seasoning and voila!

Ingredients for keto mushrooms in oven recipe

Mushrooms – mushrooms are stars of this delicious keto meal. When you simply bake them in the oven like this with modest seasoning and not many other ingredients, you get so much earthy and flavorful taste.

Don’t slice them too thin, it’s ideal to cut mushrooms in 2 – 3 pieces. You need to have a mushroom flavor when chewing.

Picture of low carb mushrooms and roasted hazelnuts

Hazelnuts – without hazelnuts this dish won’t be even close to what it could be with them. Crushed, chunky hazelnuts baked with mushrooms in the oven are incredibly flavorful.

Roasted hazelnuts release their oils and wonderful smell. Together with mushrooms are really special. Especially if you add some butter on top. OMG, fantastic flavor! 

Picture of preparation of mushrooms in oven with hazelnuts

Olive oil and butter – be generous with good virgin olive oil. Sprinkle mushrooms and hazelnuts before baking and after, when mushrooms are baked. When everything is baked, it’s the tastiest to put some olive oil on top together with a spoon of grass fed butter. Olive oil goes fantastically here, and especially in combination with butter. Grass fed butter has wonderful taste that complement mushrooms and roasted hazelnuts perfectly.

Garlic – if you are garlic lover, you can use few cloves. Just bake them together with mushrooms and hazelnuts. If you are not a huge fan of garlic, just modestly sprinkle the mushrooms with a pinch of powdered garlic.

Picture of a keto bowl of roasted mushrooms with hazelnuts and arugula

Serving low carb mushrooms in oven with hazelnuts

When you roast mushrooms with hazelnuts, just transfer them to the bowl and add 1 TBS of grass fed butter on top. You can add some olive oil too.

I like to serve this mushrooms from the oven as a main protein rich keto dish with my favorite cauliflower mash. It’s fantastic as a low carb side dish when you serve it with some meat or gravy.

Definitely add fresh arugula with these mushrooms. It’s so delicious combination!

If you like my sheet pan recipes, try this delicious keto sheet pan pancakes that are fantastic for breakfast! 

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Keto mushrooms in oven with hazelnuts

Picture of a bowl with cauliflower mash with roasted mushrooms and hazelnuts with arugula

Keto mushrooms in oven with hazelnuts is delicious keto vegetarian meal or great low carb side dish.

Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes


  • Mushrooms 400 g/14 oz
  • Hazelnut chopped 1/2 cup/60 g/2 oz
  • Olive oil 3 TBS
  • Salt to taste
  • Pinch of garlic or few cloves if you like garlic
  • Pepper to taste
  • Butter 1 TBS
  • Fresh parsley to taste
  • Cauliflower mash recipe is here
  • Fresh arugula 2 cups for serving
  • Grated parmesan cheese on top


  1. Turn on oven to 180 C/350 F.
  2. Slice mushrooms and put them on a sheet pan layered with parchment paper.
  3. Add chopped hazelnuts, season everything with salt to taste, pinch of garlic and 2 TBS of olive oil.
  4. Bake in a preheated oven on 180 C/350 F for 15 minutes or until baked and golden brown.
  5. When mushrooms are baked put them into a bowl, add 1 TBS of olive oil or grass fed butter and season with freshly ground pepper and stir to combine everything.
  6. Serve mushrooms on warm cauliflower mash.
  7. Garnish with fresh parsley and arugula.
  8. Sprinkle with parmesan cheese on top.
  9. Enjoy!

Nutrition Information:



Serving Size:

1/2 cup

Amount Per Serving: Calories: 197Total Fat: 19gCarbohydrates: 5.76gNet Carbohydrates: 3.39gFiber: 2.37gProtein: 5.25g

This is for your information only. Please calculate your own macros with ingredients you use.

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  • Reply
    February 23, 2020 at 1:27 am

    Roasted mushroom recipe fabulous. We love since reading the recipe. We eat a few times a week now! Thank you~

    • Reply
      Family On Keto
      February 23, 2020 at 6:05 pm

      Thank you for your comment, I really appreciate this! 🙂

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