Mushroom stroganoff works best when the mushrooms are treated as the main ingredient rather than simply stirred into a creamy sauce. Browning them in batches concentrates their flavor, while dried porcini add extra depth.

The finished sauce should be creamy but not heavy, with enough mustard and acidity to balance the richness.

Ingredients

For the mushrooms:

15 g dried porcini mushrooms

300 g button or chestnut mushrooms

4 large flat mushrooms

50 g butter

Salt and black pepper

For the sauce:

2 large onions, thinly sliced

A pinch of freshly grated nutmeg or ground allspice

250 ml sour cream

1 tbsp mustard

200 ml hot water

A small squeeze of lemon juice, optional

For serving:

Fresh chives or dill, finely chopped

Mashed potatoes, rice or wide egg noodles

Soak The Porcini

Place the dried porcini in a bowl and cover them with the hot water. Leave them for about 15 minutes while preparing the fresh mushrooms.

Once softened, lift the porcini from the liquid and chop them finely. Keep the soaking water, because it will become an important part of the sauce. If there is any grit at the bottom, strain the liquid before using it.

Cook The Onions Slowly

Melt half the butter in a wide frying pan over medium-low heat.

Add the onions with a pinch of salt and nutmeg or allspice. Cook slowly, stirring regularly, until they become very soft, golden and slightly sweet.

Transfer them to a bowl and keep the pan on the stove.

Brown The Mushrooms

Clean the button mushrooms and halve or quarter any larger ones.

Increase the heat and fry them until browned and most of their moisture has evaporated. Transfer them to the bowl with the onions.

Slice the flat mushrooms into thick pieces and add them to the dry pan with a small pinch of salt. Cook until they release their moisture and the liquid disappears.

Add the remaining butter and continue frying until the slices become deeply golden around the edges.

Proper browning is important here because it gives the stroganoff a much stronger savory flavor.

Build The Creamy Sauce

Pour the reserved porcini liquid into the pan and scrape up any browned pieces from the bottom.

Reduce the heat to low.

Gradually stir in the sour cream, followed by the mustard. Keep the temperature gentle so the sauce remains smooth and does not separate.

Return the onions and button mushrooms to the pan, then add the chopped porcini.

Allow everything to simmer very gently for about 8–10 minutes so the mushroom flavors blend into the sauce.

Add the browned flat mushrooms during the final few minutes.

Season And Serve

Taste and adjust with salt, black pepper and a little more nutmeg if needed.

A small squeeze of lemon can brighten the sauce if it tastes too rich.

Serve the stroganoff warm rather than boiling hot and finish with plenty of chopped dill or chives.

Mashed potatoes make the dish especially comforting, while rice or wide noodles work equally well. The key is the contrast between the creamy sauce and mushrooms that remain deeply browned and full of texture.