German Bread Casserole with Cheese and Onion Käseschnitten Recipe
Käseschnitten are simple German cheese toasts that save the day when there’s only yesterday’s bread left in the bread bin. Slices of bread are baked with a mixture of cheese, onion and a bit of sour cream until the top is golden and slightly crisp. It’s something between a Polish mushroom baguette and a French cheesy tartine – perfect for a quick, warm dinner.
In many German homes, Käseschnitten is a classic “rescue” dinner for using up leftover bread and cheese, often served after work or as a quick snack with beer. You’ll also find it in mountain huts as a filling, inexpensive hot snack.
This recipe turns simple leftover bread into a comforting, cheesy German classic with minimal effort. The combination of melted cheese, onion and a hint of mustard gives a deep, savoury flavour, while baking right to the edges keeps the bread soft inside and crisp on top.
Why this version works
- Lightly drying out the bread and adding a thin layer of butter protects the slices from getting soggy under the weight of the cheese.
- Finely grated cheese mixed with sour cream creates a creamy mixture that melts evenly.
- Mustard and chives boost the flavour of the cheese so the bake doesn’t taste bland.
- Spreading the mixture all the way to the edges prevents the bread from drying out and the crust from burning.
Chef's tips
Use a well-melting cheese such as Gouda, Edam or Emmental for the best texture. Grate it yourself rather than using pre-grated cheese, which often contains anti-caking agents and melts less smoothly. Don’t skip spreading the mixture right to the crusts – it really prevents the bread from drying out.
How to serve
Serve 2–3 slices per person for a light dinner, with a green salad or sliced raw vegetables on the side. They also work well cut into smaller pieces and served on a platter as a warm party snack.
Watch out for
- A mixture that’s too runny, with too much cream, will slide off the slices and burn on the paper.
- Don’t bake for too long – very dark cheese becomes hard and bitter instead of melty and stretchy.
- Fresh, soft bread turns mushy easily; if you don’t have stale bread, make sure to dry it out a bit.
Substitutions
- Instead of using just one yellow cheese, use a mix of Gouda and Emmental for a more “Swiss-style” flavour.
- You can replace the sour cream with thick Greek yogurt, adding a little more salt.
- Swap regular mustard for wholegrain or hot Dijon if you like a more pronounced, spicy kick.
Ingredients
- wheat or mixed bread preferably slightly stale - 8 slices
- yellow cheese hard, well-melting, grated - 200 g
- onion medium - 1 piece
- sour cream 12–18% fat - 3 tablespoons
- mustard mild - 1 teaspoon
- chives chopped - 2 tablespoons
- butter for spreading on the bread - 20 g
- black pepper to taste
- sweet paprika for sprinkling - 0.5 teaspoons
- salt to taste, carefully, the cheese is salty
Preparation
- Preheat the oven to 200°C (top and bottom heat). Line a baking tray with baking paper so that any cheese that runs off doesn’t stick. The paper should cover the entire surface of the tray.
- Peel the onion and cut it into very small dice; finely chop the chives. The finer you cut the onion, the softer and milder it will be after baking.
- Grate the cheese on the fine side of a box grater so it melts faster. In a bowl, mix the cheese, sour cream, mustard, onion and chives. Season with pepper and, if needed, a little salt; the mixture should be thick but easy to spread, with no visible dry clumps of cheese.
- If the bread slices are soft and fresh, lightly dry them out in a toaster or in a dry pan – they should still be flexible but slightly dried on the surface. This way they won’t go soggy under the cheese mixture.
- Lightly spread the bread slices with a thin layer of butter on one side and place them on the tray, buttered side up. The butter should form an even, thin coating without thick lumps.
- Put a portion of the cheese mixture on each slice and spread it in an even, not too tall layer right up to the edges. Be careful not to create “mounds” in the centre, as the cheese in those spots will bake more slowly.
- Sprinkle the top of each slice evenly with sweet paprika to get a nice golden-rust colour and a delicate aroma after baking. The surface should look lightly reddish.
- Place the tray in the preheated oven and bake for 10–12 minutes. The cheese should melt completely, bubble gently around the edges and brown in spots, but not turn dark brown or burnt.
- Remove the tray from the oven and wait 1–2 minutes until the cheese stops bubbling vigorously. Serve while the cheese is still hot and stretchy and the bottom of the bread is distinctly crisp when pressed with a knife.
Storage
Baked Käseschnitten taste best straight from the oven. If you have leftovers, cool them completely, store in an airtight container in the fridge and reheat briefly in the oven or toaster oven to restore crispness.
I like to make these whenever I have a mix of cheese ends in the fridge – a blend of different cheeses gives an even more interesting flavour. Slightly stale bread actually works better than fresh, because it holds its shape and doesn’t get soggy.
