Swedish Yellow Split Pea Soup: Classic Ärtsoppa

Swedish yellow split pea soup, or ärtsoppa, is a hearty stovetop soup of yellow peas, onion, herbs, and pork, often served with mustard. The peas soften into a naturally thick broth while the pork adds savory depth; family and regional versions vary, and a meat-free option is easy to make.

Ingredients

1 lb (454 g) dried yellow split peas, picked over and rinsed
10 cups (2.4 L) cold water
1 smoked pork hock, about 1¼–1½ lb (570–680 g)
1 medium yellow onion, about 5 oz (150 g), peeled and finely chopped
2 dried bay leaves
1 tsp dried thyme
1 tsp dried marjoram
¼ tsp ground white pepper, or to taste
½ tsp fine salt, plus more only if needed after cooking
2–3 tbsp (30–45 ml) prepared mustard, for serving

Instructions

Rinse and assemble. Spread the peas on a plate and remove any small stones or damaged peas, then rinse them under cool water. Put them in a large, heavy soup pot with the water, pork hock, chopped onion, bay leaves, thyme, and marjoram. Hold back the salt because smoked pork can make the broth salty as it cooks.
Bring the pot to a simmer. Set the pot over medium-high heat and bring the water just to a boil, which should take about 10 minutes. If foam gathers on top, skim it off with a spoon. Lower the heat so the soup bubbles gently rather than boiling hard; a strong boil can make the peas break down unevenly and can cause the bottom to catch.
Cook until the peas are tender. Cover the pot with the lid slightly ajar and simmer for about 2 hours, stirring every 20–25 minutes and scraping across the bottom. Check the liquid as you stir. If the peas are thickening before they soften, add hot water in ½-cup (120 ml) increments. The peas are ready when they crush easily against the side of the pot and the soup has a creamy, thick consistency. Older peas can take longer, so rely on texture rather than the clock alone.
Check and rest the pork. Lift the hock onto a plate. Check the thickest part of the pork with a food thermometer, avoiding the bone: USDA FSIS lists 145°F (63°C) followed by a 3-minute rest as the safe minimum for whole cuts of pork. Leave it to rest for at least 3 minutes, then pull the meat from the bone, discard the skin, bone, and any tough pieces, and cut or shred the meat into bite-size pieces.
Finish the soup. Remove and discard the bay leaves. Stir the pork back into the pot and simmer for about 10 minutes, stirring often, so the flavors come together. Taste before adding the measured salt; add a little more only if the soup needs it. Stir in a splash of hot water if you prefer a looser consistency, or simmer uncovered for a few minutes if it seems too thin. Serve hot with mustard at the table.

Tips

Soaking is optional. Yellow split peas do not need soaking for this recipe. If you soak them overnight, drain and rinse them, then begin checking for tenderness earlier; the total simmer may be shorter, but peas vary in age and still need to be soft before serving.
Keep the simmer gentle. Split peas settle at the bottom as they thicken. Stir regularly, especially during the final 30 minutes, and add hot water when needed. If the pot begins to stick, move it off the heat briefly and loosen the bottom gently rather than scraping browned bits into the soup.
Season at the end. Smoked hocks differ in saltiness, and reducing the broth concentrates its flavor. Wait until the pork is returned to the soup before deciding whether to add salt. White pepper gives a softer, traditional-style pepper note; black pepper works too but tastes more pronounced.
Choose a substitute thoughtfully. A meaty smoked ham bone can replace the hock at roughly the same weight. If using a fully cooked ham bone with little meat, add about 8 oz (225 g) diced cooked ham near the end instead of trying to extract meat from the bone. The soup will still taste smoky, though the texture and richness may be lighter.

Serving Suggestions

Serve ärtsoppa in warm bowls with a spoonful of prepared mustard on the side or stirred in a little at a time. Swedish mustard is a familiar accompaniment; if it is difficult to find, Dijon gives a sharp, tangy contrast, while a mild yellow mustard adds a gentler flavor. Keep the mustard separate so each person can choose how much to add.

Rye bread, crispbread, or a slice of sturdy sourdough makes a useful partner for the thick soup. A simple green salad or sliced cucumber can add a fresh contrast without competing with the peas and smoked pork. For a traditional-feeling meal, serve the soup as the main course and offer bread alongside rather than adding elaborate garnishes.

The soup thickens as it stands, so ladle it while it is hot and loosen individual portions with a little hot water if they have become very dense. A small dish of extra mustard at the table is more useful than mixing a large amount into the whole pot, since mustard strength and personal preference vary.

Variations

Meat-free soup: Leave out the pork and cook the peas with the onion, herbs, and water. For more savory depth, use vegetable broth in place of some or all of the water, choosing a low-salt broth so you can season at the end. A teaspoon of smoked paprika adds a smoky note, but it will not taste exactly like pork. Add it with the dried herbs, then finish the soup with mustard as usual.

Use a ham bone: A meaty smoked ham bone is a practical alternative to a hock. Simmer it with the peas, then remove it and pick off any usable meat. If the bone is already cooked and has little meat, stir in diced cooked ham for the final 10 minutes so it warms through without becoming stringy.

Add root vegetables: For a less traditional, slightly sweeter variation, add 1 medium carrot, about 3 oz (85 g), finely diced with the onion. It softens as the peas cook and adds color. You can also add a small piece of celeriac, about 3 oz (85 g), for a mild celery-like aroma; keep the pieces small so they become tender on the same schedule.

Adjust the herbs: Thyme and marjoram provide a gentle, savory flavor, but you can use 2 tsp (about 2 g) dried thyme if marjoram is unavailable. The soup will taste more herbal and less rounded. Add herbs conservatively: dried herbs become more noticeable during a long simmer, and extra seasoning can always be added to each bowl.

Storage and Reheating

Cool the soup promptly and refrigerate it within 2 hours of cooking, preferably in shallow, covered containers so it chills more quickly. Refrigerated soup keeps for 3–4 days. It thickens considerably in storage; that is normal, and a little water added during reheating restores a spoonable consistency. Keep mustard separate and add it when serving.

For longer storage, freeze the cooled soup in meal-size airtight containers for up to 3 months for best quality. Leave a little room at the top because the soup expands as it freezes. Thaw it overnight in the refrigerator, or reheat it from frozen over low heat with a splash of water, stirring as it loosens. The pork and peas may soften further after freezing, but the flavor remains satisfying.

Reheat only the amount you plan to eat, in a saucepan over medium-low heat, stirring frequently until steaming hot throughout. For food safety, USDA FSIS recommends reheating leftovers to 165°F (74°C); check the center with a food thermometer. If using a microwave, cover the bowl loosely, stir partway through, and check the temperature in more than one spot because thick soup can heat unevenly.

Frequently Asked Questions

Do yellow split peas need to be soaked?
No. Rinsing and sorting the peas is enough for this stovetop recipe. Soaking can shorten the cooking time, but the amount varies with the peas, so begin checking early and cook until they crush easily. If you do soak them, refrigerate the peas while they soak rather than leaving them at room temperature overnight.

Why are my peas still firm after two hours?
Split peas can take longer when they are older, and hard water can sometimes slow softening. Keep the pot at a steady gentle simmer, make sure there is enough liquid, and continue cooking until the peas are tender. Avoid adding acidic ingredients such as vinegar or tomatoes before the peas soften, since acid can delay cooking.

Can I make this soup without pork?
Yes. Leave out the hock and use vegetable broth for more flavor, or simply use water and increase the herbs slightly. Smoked paprika is an optional way to suggest a smoky note, but it changes the character of the soup. Since there is no pork to season the broth, taste and adjust the salt before serving.

How can I make the soup thinner or thicker?
For a thinner soup, stir in hot water a little at a time until it reaches the consistency you like. For a thicker soup, simmer it uncovered while stirring often, or mash some of the peas against the side of the pot. Avoid blending the whole pot unless you want a smooth texture; traditional-style ärtsoppa is usually thick but still has some visible pieces of pea and pork.

What kind of mustard should I serve with ärtsoppa?
Prepared Swedish mustard is a good choice, but it is not essential. Dijon provides a sharper, less sweet flavor, and yellow mustard is milder. Offer it at the table rather than stirring it into the pot, then let each person add a small amount and taste before adding more.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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