Buckwheat Casserole with Cheese and Mushrooms Recipe
Buckwheat casserole with cheese and mushrooms is a homely Polish answer to oven-baked pasta bakes. Instead of pasta, the star here is fluffy buckwheat, combined with well-browned mushrooms, cream and yellow cheese that forms a golden, slightly crisp crust. This version gently "tames" the flavor of buckwheat and wins over even those who usually don’t like it.
This is a very homely way to use buckwheat, which in Poland was long treated mainly as a side dish for sauces or meat. In casserole form it becomes a main course, often seen on the menus of milk bars and simple home-style eateries.
This casserole shows buckwheat in a completely different light than the classic "side for sauce". Thanks to the cheese and cream it has a comfort-food character, yet it’s still based on simple, easily available ingredients. It’s perfect as a make-ahead dish – after reheating it tastes almost like freshly baked.
Why this version works
- Buckwheat cooked al dente keeps its structure and doesn’t turn to mush when baked.
- Well-browned mushrooms don’t water down the mixture and give an intense mushroom flavor.
- Cream, egg and cheese act as a natural "glue" so the casserole slices cleanly.
- Parsley adds freshness and cuts through the richer cheese-and-mushroom character.
Chef's tips
The most common mistake is under-fried mushrooms – if they release a lot of liquid, the buckwheat will lose its fluffiness and collapse into a soft mass., A well-prepared mixture before baking is moist but holds together on a spoon in one piece and doesn’t run., If the top browns too quickly, loosely cover the dish with aluminum foil for the last 10 minutes.
How to serve
Serve with something tangy and crunchy, such as sauerkraut slaw, pickled cucumber or beetroot salad to refresh the palate., It’s a hearty dinner for cooler days and a practical meal to take to work – it reheats well in the microwave., For more vegetables, add a simple green salad with vinaigrette on the side.
Watch out for
- Don’t pour in the cream "by eye" – too much liquid will leave the center loose and wet.
- Fry the mushrooms patiently until the pan is almost dry, otherwise the casserole will turn out watery.
- Don’t cut the casserole immediately after baking – it needs a few minutes to set and hold its shape.
Substitutions
- Replace part of the button mushrooms with fried wild mushrooms for a deeper aroma.
- Mix 18% cream half-and-half with milk if you want a lighter version.
- Swap yellow cheese for a mix of gouda and mozzarella for better stretchiness.
- You can replace parsley with finely chopped chives or dill.
Ingredients
- buckwheat groats, raw or roasted - 200 g
- water for cooking the buckwheat - 400 ml
- button mushrooms - 300 g
- onion - 1 piece
- cheese yellow (e.g. gouda, edam) - 150 g
- 18% cooking cream - 150 ml
- egg - 1 piece
- oil rapeseed - 2 tablespoons
- garlic - 1 clove
- parsley flat-leaf or curly - 2 tablespoons
- salt
- pepper black ground
Preparation
- Rinse the buckwheat in a sieve under cold water. Transfer to a pot, add the measured water, lightly salt and cook covered over low heat for 12–15 minutes, until it absorbs the liquid and is al dente – soft but springy.
- Remove the buckwheat from the heat, leave covered for 5 minutes, then fluff with a fork so the grains separate and don’t clump together. Set aside to cool slightly – the buckwheat should be loose, not wet.
- Heat the oil in a large pan over medium heat. Add the finely diced onion and fry for 3–4 minutes until soft and translucent but not yet browned.
- Add the sliced mushrooms. Fry for 8–10 minutes over fairly high heat until they release their liquid and almost all the moisture evaporates – there should be only a slightly oily residue left in the pan and the mushrooms should start to brown.
- Towards the end of frying, add the finely chopped garlic and fry for about 1 minute, until you can clearly smell the aroma but it’s not burnt. Remove the pan from the heat.
- Preheat the oven to 180°C (top and bottom heat). Lightly grease a roughly 1.5 l baking dish with oil or butter, especially the sides, so the casserole doesn’t stick when slicing.
- In a large bowl, mix the buckwheat, mushrooms with onion, half of the grated cheese, the cream, egg and chopped parsley. Season with salt and pepper; the mixture should be clearly moist and spreadable but not swimming in cream.
- Transfer the mixture to the baking dish, smooth the top with a spoon and press down lightly so there are no empty pockets inside. Sprinkle evenly with the remaining cheese so it completely covers the surface.
- Place in the preheated oven and bake for 25–30 minutes, until the cheese has fully melted, starts to brown and bubble in spots, and the edges of the casserole pull slightly away from the dish.
- Remove the casserole from the oven and let it sit for 5–10 minutes to firm up slightly. A well-baked casserole can be cut into neat squares that hold their shape on the spatula and don’t fall apart on the plate.
Storage
Store the casserole in the fridge for up to 3 days, preferably already cut into portions. Once chilled, the cheese on top hardens, but after reheating in the oven or microwave it becomes soft and slightly stretchy again, while the buckwheat grains keep their shape.
I like this casserole best in the "fridge clean-out" version – I throw in leftover bacon, some spinach or a lone carrot if it’s lying around. It usually disappears so fast that I increasingly make a double batch from the start.
