Norwegian Black Porridge with Oats

Norwegian black porridge, a style of blood porridge known in Norway as blodgraut, combines animal blood with grain and milk for a thick, dark, gently sweet bowl. Regional and family recipes vary; this home version uses rolled oats, rye flour, and pork blood, with dark syrup for a rounded flavor.

Ingredients

1 cup (90 g) old-fashioned rolled oats
1/2 cup (60 g) rye flour
2 cups (480 ml) whole milk
1 cup (240 ml) cold water
1 cup (240 ml) food-grade pork blood, thawed in the refrigerator if frozen
2 tablespoons (30 ml) dark syrup, such as Norwegian mørk sirup, or dark molasses
1 teaspoon (6 g) fine salt
1/4 teaspoon (0.5 g) ground allspice
2 tablespoons (28 g) unsalted butter
Optional toppings: 1/4 cup (50 g) brown sugar, or 1/2 cup (160 g) lingonberry preserves

Instructions

Prepare the ingredients. Measure the oats, flour, milk, water, syrup, salt, and allspice before you start heating the porridge. Use pork blood sold specifically for cooking by a licensed butcher or food supplier, and follow its handling directions. If it is frozen, thaw it in the refrigerator, not on the counter. Stir or whisk the blood until smooth before measuring, since it can separate while standing.
Make a smooth flour mixture. In a heavy, medium-sized saucepan, whisk the rye flour with about 1/2 cup (120 ml) of the cold milk until no dry pockets or lumps remain. Gradually whisk in the rest of the milk and the cold water. Mixing the flour with cold liquid first helps keep it smooth once the pan warms.
Add the oats and seasonings. Whisk in the rolled oats, syrup, salt, and allspice. Slowly pour in the pork blood while whisking steadily so it disperses evenly through the milk mixture. The color will darken immediately. Scrape the bottom and corners of the pan with a heatproof spatula so flour and oats do not settle and scorch.
Heat slowly, stirring often. Set the saucepan over medium-low heat and stir continuously for about 8 minutes, until the mixture is steaming and begins to thicken. Do not rush this stage with high heat: gradual warming and frequent stirring help prevent lumps and keep the milk and blood mixture from catching on the bottom.
Simmer until thick and fully cooked. Lower the heat and cook gently for about 17 minutes, stirring frequently and more often as the porridge thickens. It should be glossy, very dark, and thick enough to fall slowly from a spoon. Do not let it boil hard. Insert an instant-read thermometer into the center of the thick porridge without touching the pan; for a conservative safety target, cook it throughout to 160°F (71°C), the USDA FSIS safe minimum temperature for ground pork. If it has not reached that temperature, continue gently cooking and stirring, then check again.
Finish and serve. Take the pan off the heat and stir in the butter until melted. Let the porridge stand for 5 minutes to settle and thicken slightly, then taste and adjust the salt if needed. Divide among four warm bowls and add brown sugar or lingonberry preserves at the table if you like.

Tips

Choose the right blood. Use food-grade pork blood from a reputable supplier and keep it refrigerated according to the package directions. Blood collected or handled for purposes other than cooking is not a safe substitute. If you cannot obtain food-grade blood, make ordinary oat porridge with dark syrup instead; it will be a pleasant dark-sweet variation, but it is not black porridge in the blood-porridge sense.
Keep the heat gentle. A heavy-bottomed pan and low, steady heat are more useful than a rapid boil. Stir across the base of the pan regularly, especially once the porridge thickens. If it begins to stick, lower the heat immediately and scrape gently; do not scrape up any burnt layer.
Adjust thickness with warm liquid. Oats continue absorbing moisture as the porridge stands. If it becomes thicker than you want, stir in warm milk a tablespoon or two at a time. Adding a large amount of cold milk at once can cool the mixture unevenly and make the texture harder to control.
Make the grain choice deliberately. Rye gives the porridge a slightly earthy, traditional grain flavor. If rye is unavailable, use an equal amount of finely ground oat flour, though the flavor will be milder and the texture less distinctive. For a gluten-free version, choose certified gluten-free oats and a gluten-free flour such as buckwheat flour; check that any syrup and toppings suit your needs.

Serving Suggestions

Serve the porridge hot in modest bowls, since its texture is dense and filling. Brown sugar or dark syrup provides a simple sweet finish, while lingonberry preserves add a tart, fruity contrast. If lingonberries are hard to find, cranberry preserves or a spoonful of unsweetened applesauce are practical alternatives; they change the fruit flavor but still balance the earthy grain and savory notes.

For a more substantial meal, put a small dish of butter, sugar, and preserves on the table so each person can adjust their bowl. Some household versions lean sweet and others are more savory, so it is reasonable to start with restrained toppings and let diners choose. A glass of cold milk or a cup of coffee makes a straightforward accompaniment. Keep the porridge itself hot until serving rather than leaving it at room temperature while people eat.

Variations

Use a different grain blend: Replace up to half of the rolled oats with barley flakes for a chewier texture and a deeper grain flavor. If you use coarse barley rather than flakes, it needs more cooking time and liquid, so it is not a direct one-for-one swap in this timing. Rye flour can also be replaced with whole-wheat flour, which makes the taste less earthy and the color slightly lighter.

Change the sweetness and spice: Norwegian mørk sirup is a useful traditional-style sweetener when available. Dark molasses is a practical substitute, but it has a stronger, more bitter flavor, so begin with 1 tablespoon (15 ml) and add more after cooking if desired. A pinch of cinnamon or ground cloves can be used instead of allspice, though these are flavor variations rather than required ingredients.

Make a meat-free oat bowl: If you do not eat blood or cannot source it safely, cook the oats, rye flour, milk, water, syrup, salt, and spice without the blood. The result will be tan rather than black and will have a different texture and flavor. Activated charcoal is not an appropriate substitute for blood and is not included in this recipe.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in a shallow, covered container. Keep the porridge refrigerated for 3 to 4 days. It firms considerably as it chills, so portion it before storing if you expect to reheat only a little at a time. Do not leave it at room temperature overnight, and do not treat it as a shelf-stable preserve.

To reheat one portion on the stovetop, put it in a small saucepan with 1 to 3 tablespoons (15 to 45 ml) of milk or water. Warm over low heat, stirring frequently until smooth and steaming. Reheat leftovers to 165°F (74°C), checking the center with a food thermometer. Add more liquid in small amounts if needed. In a microwave, cover loosely, heat in short intervals, and stir between intervals so the center heats evenly; verify the same 165°F (74°C) temperature. The porridge can also be frozen in airtight portions for up to 2 months for best quality. Thaw it in the refrigerator and reheat as directed; the texture may be a little softer after freezing.

Frequently Asked Questions

What is Norwegian black porridge?

It is a dark, thick porridge made with animal blood and grain, often with milk or another liquid. Norwegian names and recipes vary by place and household, and the grain may differ. This version uses oats and rye flour with pork blood, rather than claiming to represent every regional recipe.

Does this recipe taste strongly of blood?

The cooked porridge has an earthy, savory grain flavor and a distinct richness; the dark syrup softens the edge without making it taste like dessert. The exact flavor depends on the blood and grain used. Serve toppings separately so each person can choose a sweeter or more savory bowl.

Can I use another kind of blood?

Use only blood sold as food and follow the supplier’s instructions for storage and cooking. Pork blood is specified here because it is a practical choice for this recipe, but traditional household versions may differ. If using another food-grade type, its flavor and texture may change; do not use blood that is unlabelled or not intended for eating.

Can I make the porridge without blood?

Yes, but it becomes a different dish. Cook the oats and rye with the milk, water, syrup, salt, and spice for a darkened, sweet-leaning grain porridge. It will not have the characteristic color, richness, or setting behavior of blood porridge, and adding charcoal does not reproduce those qualities.

Why did my porridge turn lumpy or stick to the pan?

Lumps often form when flour is added directly to hot liquid, which is why this recipe first blends it with cold milk. Sticking usually means the heat is too high or the pan has not been stirred often enough. Whisk the cold flour mixture thoroughly, use a heavy saucepan, and stir across the bottom as the mixture thickens.

Can I prepare it ahead?

You can cook the porridge a day or two ahead and refrigerate it promptly, then reheat it gently with a little added milk or water. It will be much firmer when cold, so loosen it gradually rather than expecting it to return to its original consistency immediately. Bring reheated portions to 165°F (74°C) and serve hot.

More recipes to cook

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

Spotted an error? Tell us and we will correct it (corrections policy).