
What is Kaszanka with Onion?
Kaszanka, also known as kiszka, is a traditional Polish blood sausage made with pork, buckwheat, and spices. In this recipe, it’s combined with sautéed onions to create a savory and rich dish.
Though it’s often compared to blood pudding, the focus of kaszanka is its unique blend of grains and seasonings.
Kaszanka with onion is a classic comfort food in Poland, offering a flavorful balance between the soft, creamy sausage and the sweetness of caramelized onions. This simple dish can be enjoyed on its own or served with potatoes or fresh bread.
Why I Love This Fried Kiszka with Onion Recipe
I love this recipe because it brings out the flavors of a traditional Polish kitchen, reminding me of home-cooked meals that are hearty and full of flavor.
The kaszanka becomes incredibly flavorful when cooked, and the onions add a sweetness that balances the richness of the sausage.
This dish is quick and easy to make, requiring just a few simple ingredients, but the result is truly satisfying. It’s a dish that works for a cozy dinner or even as a breakfast, paired with a slice of rustic bread.
Key Ingredients & Substitutions for Kaszanka with Onion
Kaszanka (Kiszka): You’ll need Polish kaszanka, which is a buckwheat-based blood sausage. You can find this at most Eastern European markets. If unavailable, any coarse-grained sausage can work as a substitute, though it won’t have the same traditional flavor.
Onion: A yellow or white onion is perfect for this dish as it caramelizes beautifully when sautéed.
Olive Oil: Used to sauté the onions and kaszanka, though you could also use butter for a richer flavor.
Seasonings: The classic combination of salt, pepper, and marjoram adds depth and enhances the flavors.
Tools You’ll Need
- Large Skillet: For sautéing the onions and kaszanka.
- Sharp Knife: For finely chopping the onions.
- Wooden Spoon: To stir and break apart the kaszanka as it cooks.
Step-by-Step Instructions for Polish Kaszanka with Onion
Prepare the Ingredients
1. Chop the onions: Finely chop the onion into small pieces, making sure they are evenly sized so they cook uniformly. Peel the blood sausage, from its casing – in most types of kaszanka, the casing is not edible.
Sauté the Onions
2. Heat the oil: In a large skillet, heat 2 tablespoons of olive oil over medium heat.
3. Cook the onions: Add the chopped onions to the skillet and sauté them for about 5-7 minutes, stirring occasionally, until they become soft and golden brown.
Add the Kaszanka
4. Slice the kaszanka: Cut the kaszanka into thick slices or remove the casing, breaking it into smaller pieces if desired.
5. Cook the kaszanka: Add the kaszanka to the skillet with the onions. Sauté for another 8-10 minutes, stirring occasionally, until the kaszanka softens and becomes tender. Break it up gently as it cooks to combine it with the onions.
Season the Dish
6. Season: Once the kaszanka is fully cooked, season with salt, pepper, and a generous pinch of dried marjoram. Stir well to combine the flavors.
7. Simmer and Serve: Lower the heat and allow the flavors to meld together for another 2-3 minutes. Serve hot, garnished with a bit of fresh parsley if desired.

Expert Tips for Perfect Kaszanka with Onion
Low and Slow: Sauté the onions slowly over medium heat to caramelize them, which will enhance their sweetness and add depth to the dish.
Break the Kaszanka Apart: If you prefer a more even texture, break the kaszanka into smaller pieces as it cooks, allowing it to mix more thoroughly with the onions.
Use Fresh Marjoram: Fresh marjoram works wonders in this dish. If using fresh herbs, add them at the end of the cooking process to maintain their flavor.
Serve with Sides: Kaszanka pairs well with mashed potatoes, boiled new potatoes, or a simple green salad.
Serving Suggestions
Kaszanka with Onion is often served as a comforting main dish alongside potatoes or sourdough rye bread. You can also pair it with a side of mustard for an added tangy flavor or a light green salad to complement the rich sausage.
For a complete Polish meal, serve with pickled cucumbers or sauerkraut to add a refreshing contrast.
Make-Ahead and Storage
Make-Ahead: Kaszanka with Onion can be prepared ahead of time and stored in the fridge. Just reheat in a skillet before serving.
Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.
Reheating: To reheat, simply warm in a skillet over medium heat with a bit of olive oil.
Freezing: While kaszanka can be frozen before cooking, it’s best enjoyed fresh once cooked. If freezing raw, wrap tightly and freeze for up to 2 months.
Print
Polish Kaszanka with Onion (Kiszka z Cebulą)
- Total Time: 25 minutes
- Yield: 2 servings 1x
Description
Polish Kaszanka with Onion (Kiszka z Cebulą) is a classic Polish dish combining kaszanka, a buckwheat-based blood sausage, with sweet, caramelized onions. It’s a simple yet hearty meal that can be prepared in under 30 minutes!
Ingredients
- 300g Polish blood sausage – kaszanka (kiszka)
- 150g white onion, finely chopped
- 2 tablespoons olive oil
- 1/2 teaspoon salt, to taste
- 1/4 teaspoon black pepper
- 1 teaspoon dried marjoram
Instructions
- Sauté the onions: Heat the olive oil in a large skillet over medium heat. Add the finely chopped onions and sauté for 5-7 minutes, until golden and soft.
- Cook the kaszanka: Take the blood sausage out of its casing. Slice or break apart the kaszanka and add it to the skillet. Cook for 8-10 minutes, stirring occasionally, until the kaszanka becomes dark brown and is fully cooked.
- Season: Season with salt, pepper, and dried marjoram. Stir to combine the flavors.
- Simmer: Let the dish simmer for another 2-3 minutes to allow the flavors to meld. Serve hot.
Notes
- You can add a little garlic to the onions for extra flavor if desired.
- This dish pairs well with a side of mustard or pickles for a tangy contrast.
- Feel free to adjust the amount of onions to your liking. Some prefer a more onion-heavy dish for added sweetness
- Prep Time: 5 minutes
- Cook Time: 20 minutes
- Category: Main dish
- Cuisine: Polish
Nutrition
- Calories: 300
- Sodium: 450mg
- Fat: 20g
- Saturated Fat: 6g
- Carbohydrates: 15g
- Protein: 10g
- Cholesterol: 40mg
Nutrition Information
This website offers estimated nutritional details, which may vary depending on the specific ingredients used.
Frequently Asked Questions (FAQ)
Can I use another type of sausage instead of kaszanka?
While kaszanka is the traditional sausage used in this dish, you can substitute with other types of sausage like kielbasa, though the flavor will differ.
Is kaszanka gluten-free?
Kaszanka is generally made with buckwheat, which is gluten-free, but it’s important to check the packaging to ensure there are no added fillers containing gluten.
What can I serve alongside kaszanka with onion?
This dish pairs well with boiled potatoes, mashed potatoes, or fresh bread. A side of sauerkraut or pickles also complements the flavors beautifully.



My family’s unique touch is we serve it with ketchup instead of mustard. As far as substitutions go, other ethnic groups have a blood sausage similar to kiszka, such as boudin noir or black pudding. Ask about seasonings and fillers because they can really change this recipe.
That sounds delicious! 😊 Ketchup is definitely a unique family twist. You’re also absolutely right that other blood sausages, such as black pudding or boudin noir, can work as substitutes. Just keep in mind that the seasonings and fillers vary quite a bit between brands and styles, so the final flavor may be different from traditional Polish kaszanka. Thank you for sharing! ❤️