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Garlic roasted mushrooms in a blue bowl garnished with fresh thyme.

Garlic Butter Roasted Mushrooms

Quick and easy to make with just a few simple ingredients, these roasted mushrooms are coated with a garlic butter for a flavorful side dish.
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Course: Side Dish
Cuisine: American
Diet: Gluten Free, Vegetarian
Prep Time: 5 minutes
Cook Time: 15 minutes
Total Time: 20 minutes
Servings: 4 servings
Calories: 199kcal
Author: Betty Davies


  • 12 ounces mixed mushrooms (340g)
  • 4 cloves garlic chopped
  • 8 sprigs thyme leaves only
  • ½ stick salted butter (4 tablespoons / 57g)
  • 2 tablespoons oil


  • Pre heat the oven to 430F / 220c.
  • Slice the mushrooms. Keep them fairly thick as they will shrink when roasted.
  • Place in a large bowl with the chopped garlic and thyme leaves.
  • Melt the butter and pour over the mushrooms
  • Add the oil and toss to combine.
  • Place in a single layer on a baking sheet and roast for 15 to 20 minutes.


  • Ensure that the mushrooms are well coated in the butter and oil so that they brown all over.
  • Place the mushrooms in a single layer on a sheet pan. If they are too crowded, they will steam rather than roast. If you double the recipe, use a larger baking sheet or cook them in batches.
  • Slice the mushrooms fairly thickly as they will shrink in size during roasting.
  • If you have an older baking sheet, line it with foil so that the mushrooms don't stick.


Calories: 199kcal | Carbohydrates: 7g | Protein: 2g | Fat: 19g | Saturated Fat: 8g | Cholesterol: 30mg | Sodium: 109mg | Potassium: 283mg | Fiber: 2g | Sugar: 2g | Vitamin A: 448IU | Vitamin C: 4mg | Calcium: 17mg | Iron: 1mg