Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

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Right here’s a easy however exceptionally tasty solution to cook dinner portobello aka flat mushrooms (additionally referred to as area mushrooms or “BBQ mushrooms”). The attraction lies in how the herb butter soaks deeply into the mushrooms, and within the sliced inexperienced onions that lend a definite flavour and enticing emerald color to the darkish, roasted mushrooms.

This recipe is good for serving mushrooms because the centrepiece of a meatless meal, or as a starter for a multi-course dinner!

Roasted Large Mushrooms with Green Onion Thyme Butter on a plate, ready to be eaten
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

All people loves mushrooms, and this low-effort recipe for serving chunky portobellos makes a fantastic vegetable aspect to accompany any variety of dishes, like scorching steaks, Sticky Grilled Chicken and Garlic Prawns. With their beefy texture and topped with this flavoursome melted butter, they’re additionally substantial and attention-grabbing sufficient to star as a major course for vegetarians or omnivores alike.

Herbs convey perfume and color, whereas the inexperienced onions add one other layer of curiosity to the flavour and steps away from the same old garlic-and-butter routine.

How good does this look!!! (That’s a rhetorical query, by the way in which… 😂)

Overhead photo of Roasted Large Mushrooms with Green Onion Thyme Butter on a tray, ready to be served
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

Right here’s all it is advisable to make these roasted Flat Mushrooms:

Ingredients for Roasted Large Mushrooms with Green Onion Thyme Butter
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe
  • Giant mushrooms – Any massive mushrooms which are round 10cm /4″ or bigger in diameter are perfect for this recipe. You simply want mushrooms massive sufficient so you possibly can slather the cups with the inexperienced onion and herb butter. And keep in mind, they’ll shrink a good bit when cooked!

    You’ll discover them offered labelled with numerous names right here in Australia. Flat mushrooms, area mushrooms, BBQ mushrooms, portobello mushrooms. Simply go by measurement!

  • Butter – Softened, so we will combine within the herbs.

  • Thyme and parsley – The herbs of selection right here. Thyme, as a result of thyme loves mushrooms, and parsley for freshness.

  • Inexperienced onions / shallots – Referred to as scallions within the US, this provides a vibrant splash of inexperienced in addition to recent allium goodness. The onions stand in for delicious-but-a-little-predictable garlic, for one thing a bit completely different. (After all, be at liberty to additionally add garlic – it actually gained’t harm!)

Mushrooms – Cleansing, making ready, storing

Find out how to clear mushrooms – Clear mushrooms by eradicating dust utilizing a material or paper towel. In the event you’re going all out or have to get into the cracks and crevices, use a pastry brush! Although as of late, grocery retailer mushrooms are offered fairly clear.

Opposite to frequent knowledge, you can in actual fact additionally wash mushrooms to scrub them too. They’ll take in a tiny quantity of water nevertheless it’s negligible. So so long as it’s fast wash, they won’t go watery or slimy.

Ought to I take away mushroom gills? Mushroom gills are completely edible and I by no means take away them, except I’m making particular varieties of stuffed mushrooms the place I need to make room for extra filling. Some folks say they don’t just like the flavour of the gills (eg dusty flavour), I’ve by no means skilled that.

Nevertheless, in the event you don’t just like the gills, simply take away them utilizing a spoon. Cradle mushroom in a single hand, gently work the tip of a spoon below the gills and scoop round – it’s going to come off with little effort.

The stem – In case your mushroom has a really lengthy stem, trim it so it’s the peak of the sting of the mushroom, or snap it off (with recent mushrooms, the stem will break off neatly).

Find out how to retailer mushrooms – All the time retailer mushrooms in a breathable bag, akin to a brown paper bag or wrapped in a tea towel. In the event you use plastic baggage or containers, the mushrooms will sweat, the floor will go slimy and the shelf lifetime of the mushrooms will probably be significantly shorter.

It couldn’t be faster or simpler – 3 straightforward steps!

  1. Combine softened butter with inexperienced onions and herbs;

  2. Slather onto mushrooms; and

  3. Roast 25 minutes till cooked by means of. That’s it!

Green onion thyme butter to put on mushrooms to be roasted
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe
Fork picking up Roasted Large Mushrooms with Green Onion Thyme Butter
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

Satisfying and but so easy. We want extra recipes like this on this planet!

So, what do you suppose? How will you serve these – as a major or as a aspect?

Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe
Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

Roasted Flat Mushrooms with Green Onion, Thyme & Butter Recipe

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Serves: 4 Prep Time: Cooking Time:
Nutrition facts: 230 calories 20 grams fat
Rating: 5.0/5
( 1 voted )

Ingredients

  • 8 large mushrooms (flat, portobello, “BBQ”), around 10 – 12cm / 4 – 4.5″ wide, stem tips trimmed (Note 1)
  • 100g / 7 tbsp unsalted butter , softened
  • 1 cup green onion (US:scallions), thinly sliced
  • 1/3 cup parsley , finely chopped
  • 1 tbsp fresh thyme leaves (sub 1 tsp dried)
  • 1/2 tsp salt
  • 1/4 tsp black pepper
  • 3 tbsp chopped scallions
  • 1 dozen thyme stalks

Instructions

  1. Clean mushrooms: See Note 1.
  2. Preheat oven to 200°C / 390°F (180°C fan).
  3. Mix butter: Mix the Herb & Green Onion Butter ingredients together in a medium bowl.
  4. Smear mushrooms: Place mushrooms gills side up on a large tray. Smear the butter mix over the mushroom surfaces. Cover with foil (preserves green colour of herbs).
  5. Bake: Bake 25 minutes, until mushrooms are tender.
  6. Serve! Arrange on a platter, including all butter and juices on tray. Scatter with thyme stalks and extra scallions over the mushrooms (for a fresh touch), and serve.

Notes

1. Mushrooms – Use any type of large mushrooms. If they are much smaller than specified, use more. The idea here is just to use large mushrooms big enough to hold the butter!
How to clean mushrooms – Clean mushrooms by removing dirt using a cloth or paper towel. If you’re going all out or need to get into the cracks and crevices, use a pastry brush! Though these days, grocery store mushrooms are sold pretty clean.
It’s best not to wash with water because mushrooms are extremely porous and so if they absorb water, it can make them slimy or mushy. 
Should I remove mushroom gills? Mushroom gills are totally edible and I never remove them, unless I’m making specific types of stuffed mushrooms where I want to make room for more filling. Some people say they don’t like the flavour of the gills (eg dusty flavour), I’ve never experienced that.
However, if you don’t like the gills, just remove them using a spoon. Cradle mushroom in one hand, gently work the tip of a spoon under the gills and scoop around – it will come off with little effort.
The stem – If your mushroom has a very long stem, trim it so it’s the height of the edge of the mushroom, or snap it off (with fresh mushrooms, the stem will break off neatly).
How to store mushrooms – Always store mushrooms in a breathable bag, such as a brown paper bag or wrapped in a tea towel. If you use plastic bags or containers, the mushrooms will sweat, the surface will go slimy and the shelf life of the mushrooms will be considerably shorter.

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Sarah Miller
Sarah Miller

Hi, I’m Sarah Millar!
I’m a food blogger who loves creating quick and easy recipes that bring big flavor without the fuss. Cooking doesn’t have to be complicated — and I’m here to share simple, fast food ideas that anyone can make at home. When I’m not in the kitchen, you’ll usually find me tasting new dishes, exploring cafés, or coming up with fresh food hacks to make everyday meals more fun.

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