What ingredients do I need to make garlic butter roasted mushrooms?

You will need fresh mushrooms such as white button, cremini, or portobello, along with unsalted butter and olive oil. Garlic minced finely adds flavor, and basic seasonings like salt and pepper are essential. Optionally, lemon juice and fresh thyme can be added after roasting to brighten the taste. Olive oil prevents the butter from burning during roasting while allowing the garlic butter flavor to shine.

How long and at what temperature should mushrooms be roasted in the oven?

Roast mushrooms at 425°F (220°C) for about 20 to 25 minutes. Smaller mushrooms may finish closer to 15 minutes, while larger ones like portobello can take up to 25 minutes. Avoid stirring or turning mushrooms during roasting to develop a rich caramelized color and retain juiciness.

What’s the best way to clean mushrooms before roasting?

Use a damp paper towel or a soft brush to gently wipe dirt off each mushroom. If rinsing, do so quickly under running water and immediately pat dry with a towel. Avoid soaking mushrooms in water as they absorb moisture, which can make them soggy during roasting.

Are garlic butter roasted mushrooms healthy to eat?

Mushrooms are low in calories and rich in nutrients like antioxidants, vitamin B, potassium, and copper. Butter adds flavor but also increases calorie and fat content, so use it in moderation if you’re monitoring intake. Pairing mushrooms with nutrient-rich sides can create a balanced meal.

How can I use the juices released from large roasted mushrooms?

The buttery mushroom juices collected in the pan are full of flavor. Spoon them over the mushrooms when serving, or drizzle them on side dishes like mashed potatoes, rice, or toast to add a rich, savory note without extra effort.

Garlic Butter Roasted Mushrooms Recipe For Easy Side Dish

Ingredients

Scale

500g mushrooms (white button, Swiss brown/cremini, or portabello)
50g unsalted butter, melted (or vegan butter)
1 tbsp olive oil
2 to 4 garlic cloves, finely minced
1/2 tsp salt
1/2 tsp pepper
Optional: 1 tbsp Italian seasoning or fresh herbs
Optional finishing: 1 1/2 tbsp lemon juice and 1 tsp fresh thyme or chopped parsley

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Instructions

1. Preheat the oven to 220°C (425°F) and preheat a cast iron skillet if using.
2. Clean mushrooms, ensuring not to soak them. Trim stems if desired.
3. Mix melted butter, olive oil, garlic, salt, and pepper in a bowl. Coat mushrooms evenly.
4. Arrange mushrooms in a single layer on a tray or skillet.
5. Roast for 20–25 minutes without stirring, basting with butter halfway.
6. Optionally, add lemon juice and herbs after roasting.
7. Serve hot as a side, appetizer, or topping.

Last Step:

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Notes

🔥 Combine butter with olive oil to prevent burning.
🌿 Do not toss mushrooms during roasting to maintain caramelization.
🍳 Use a hot cast iron skillet for excellent sear and flavor development.

Author: Brandi Oshea
Prep Time: 5-10 minutes
Cook Time: 20-30 minutes
Category: Side Dish
Method: Roasting
Cuisine: International
Diet: Vegetarian

Nutrition

Serving Size: 1 cup
Calories: 140 kcal
Sugar: 2 g
Sodium: 150 mg
Fat: 12 g
Saturated Fat: 6 g
Unsaturated Fat: 5 g
Trans Fat: 0 g
Carbohydrates: 5 g
Fiber: 1 g
Protein: 4 g
Cholesterol: 25 mg