Fillet of Beef with Smoked and Fresh Mushrooms

A fillet of beef, what’s known as a tenderloin in the US, is a princely cut and so it should be because it costs a king’s ransom. For a special occasion though, it’s a lovely thing to bring to the table and although it’s expensive, there’s no waste on it. And it’s quick to cook. There, that’s the self-justification out of the way.

I’ve cooked it in the past simply rolled in herbs but I was recently given a packet of dried, oak-smoked oyster mushrooms and when I was casting around for what to do with them, Tim from the Artisan Smokehouse suggested grinding them down and rolling a piece of meat in them. Genius. The rest of the recipe followed from there.

Image of dried, smoked oyster mushrooms

In addition to the smoked mushroom crust I made a red wine and mushroom sauce and a mushroom stuffing. In order to stuff a fillet of beef you need to butterfly it, rather nerve-wracking with such an expensive cut if you haven’t done it before.

There are two ways to do it, with a single horizontal cut that means the fillet opens out like a book, or (my preferred option) with a double cut that gives you a flatter, bigger piece of meat to play with. I’ll try to explain in the body of the recipe but if in any doubt, take a look at this video.

The meat can be prepared and stuffed a day in advance and the sauce can also be made ahead of time and re-heated. The actual cooking and resting of the beef only takes about 45 minutes. Sorry about the rather ragged carving picture, I was more concerned about getting it to the table at that point. 🙂

Fillet of Beef with Smoked and Fresh Mushrooms

Image of mushroom-stuffed fillet of beef with a smoked, dried mushroom coating

About 750-800g fillet of beef, from the thick part of the fillet

About 5g smoked dried mushrooms, ground to a powder

Salt and freshly ground black pepper

For the stuffing:

20g dried porcini mushrooms, soaked in hot water

100g fresh mushrooms (I used chestnut but wild mushrooms would be good too), finely chopped

1 medium onion, peeled and finely chopped

1 clove of garlic, peeled and crushed

2-3 small sprigs of thyme, leaves stripped

30-50g pâtÊ (I used Brussels pâtÊ)

A knob of butter and 1 tbsp oil

For the sauce:

1 small onion, finely chopped

100g fresh mushrooms, thinly sliced

Butter for frying

1 heaped tbsp plain flour

The mushroom soaking liquid, strained through a fine mesh

1 glass red wine

About 300-400 ml chicken or beef stock (depends how many you’re feeding)

Salt and freshly ground black pepper


Image of fresh mushrooms being chopped

First make the stuffing. Cover the dried porcini mushrooms with hot water and leave to soak for 20 minutes, then fish them out and chop finely, reserving the soaking liquid for the sauce. Heat the butter and oil in a deep frying pan and cook the onions until soft and golden. Add the garlic, the fresh mushrooms, the chopped porcini and the thyme and cook until the mushrooms have given up their moisture. Season to taste.

Remove from the heat, place in a bowl and allow to cool, then mix in just enough pâtÊ to make the mixture cling together. Take a piece of cling film, place the stuffing in the middle and wrap and roll to form a sausage a little shorter than your piece of beef. Place in the fridge to firm up.

To prepare the meat, first remove any silvery skin on the outside with a sharp knife. Lie the fillet on your chopping block and slice along the long side about a third of the way up the thickness of the fillet. With smooth strokes, follow the cut through so it folds out like a book. One side will now be thicker than the other side.

Make another lengthways slice through the thick part, from the centre towards the outside edge, stopping about 2cm short. Open it out so you have a flat piece of meat, effectively with a double hinge. Honestly, it’s easiest to watch the video.

Image of mushroom stuffing and butterflied beef fillet

Place the stuffing in the middle, roll up and tie with string, hopefully more neatly than I did. Put a layer of the powdered smoked mushrooms on your work surface or in a large flat dish (best not done with the window open on a draughty day).

Roll the beef fillet in this, coating well, and season with black pepper. Set aside in the fridge but take it out half an hour before you want to start cooking.

Image of rolled fillet coated in dried smoked mushroom powder

To make the sauce, heat the butter in a pan and fry the sliced mushrooms until just cooked. Remove and set aside. In the same pan, fry the chopped onion gently until soft and golden. Stir in the flour and continue to cook on a gentle heat for a couple of minutes. Add the red wine and stir well, then gradually add the mushroom soaking liquid and stock. Cook, stirring, until the mixture has thickened and reduced. If you want a smooth sauce, give it a whizz with a hand blender. Season to taste, put the mushrooms back in and set aside.

To cook the beef, pre-heat the oven to 200C/400F/Gas Mark 6. Season the meat with salt to taste, heat a tablespoon or so on oil in a roasting tin and quickly sear the beef on all sides until browned. Place in the oven and cook for about 15 minutes for rare (this joint will be ruined if you overcook it), then remove from the oven, cover loosely with foil and leave somewhere warm to rest for 15 minutes.

Slice and serve with the mushroom and red wine sauce and the vegetables of your choice. A celeriac mash would be good with it, or Dauphinoise potatoes. And of course a decent, robust red wine: we drank a Rioja Gran Reserva.

Image of beef, served with mushroom sauce and veg

10 thoughts on “Fillet of Beef with Smoked and Fresh Mushrooms

  1. Great idea to combine smoked and ‘normal’ mushrooms. And I think your explanation and photos of filleting, stuffing and tying the steak is very clear. Bet you really enjoyed this dinner! x

    • Thank you, so pleased you liked it. It’s certainly something I’d cook again for a special occasion, the combination of smoked and fresh mushrooms worked a treat. Lx

  2. You are fearless! I’ve butterflied roasts before but never fillet of beef. I’d be afraid of ruining it. Still, my poor knife skills aside, this sounds like a delicious way to prepare beef and your photos have my mouth watering. I need to find a butcher with a steady hand. My old one was just that: old. He retired. 🙂

    • I did watch the video about six times! Actually the cuts are very simple once you’ve grasped the basics, but I took a very deep breath before getting stuck in … thanks once again for the kind words. Lx

  3. I say, this looks grand! Wellington-esque. I do love rare beef and keep meaning to tackle a Wellington but haven’t dared yet. Smoked mushrooms sound divine – I sent the mother-in-law a little hamper from The Artisan Smokehouse last year. I think that had their smoked mushrooms in. I must have a rummage in her cupboard to see if she’s used them… 😉

    • I got these from a forager but I’m sure Tim’s would work just as well. Yes, I like the idea of Beef Wellington too, but I’m always a bit nervous I’ll overcook it. The advantage of this recipe is that you can test the meat to see what’s going on. And without wishing to blow my own trompette (see what I did there?) it was exceedingly good.

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