Mortadella is an emulsified Italian sausage made from finely ground pork blended with cubes of pure white fat, seasoned with spices like black pepper, myrtle berries, and sometimes pistachios. Making it at home requires a meat grinder, a way to emulsify the meat into a smooth paste, large casings, and a low-temperature oven or smoker. The process takes most of a day, but the result is a rich, silky cold cut that’s hard to replicate with store-bought versions.
Ingredients and Ratios
A standard batch uses about 10 pounds (4.5 kg) of meat, which fits neatly into one beef bung casing. Here’s what you need:
- Lean pork (shoulder or loin): 7 lbs (3.2 kg)
- Pork back fat: 3 lbs (1.4 kg), divided. About two-thirds goes into the grind for emulsification. The remaining third gets diced into visible cubes.
- Salt: 2.5% of total meat weight (about 4 tablespoons for 10 lbs)
- Curing salt (Prague Powder #1): Use the package directions to hit 156 ppm sodium nitrite, which is the USDA limit for cured sausages. For most brands, that works out to roughly 1 teaspoon per 5 lbs of meat.
- Protein binder: 3% of total weight. Nonfat dry milk powder is the easiest option. Soy protein isolate or wheat flour also work.
- Black peppercorns: 1 tablespoon, left whole
- Ground mace: 1 teaspoon
- Ground coriander: 1 teaspoon
- Garlic powder: 1 teaspoon
- Pistachios (optional): ½ cup, shelled
- Ice water: about 1 cup, kept very cold
The protein binder is important. In commercial mortadella production, about 3 kg of binder per 100 kg of meat helps stabilize the emulsion so the fat doesn’t separate during cooking. Nonfat dry milk powder works well at home and adds no noticeable flavor. Without it, you risk a grainy, broken texture instead of the smooth, sliceable result you want.
Getting the Meat Cold Enough
Temperature control is the single most important factor in making any emulsified sausage. The meat, fat, grinder parts, and bowl should all be as cold as possible without being frozen solid. Cut the lean pork and the portion of back fat destined for grinding into 1-inch chunks, spread them on a sheet pan, and put them in the freezer for 30 to 45 minutes until they’re firm and slightly crunchy on the outside but not frozen through. Do the same with the grinder blade, plates, and auger.
If the meat warms above about 40°F (4°C) during grinding or emulsifying, the fat will smear instead of binding with the protein. That means a crumbly, greasy sausage. Keep everything brutally cold throughout the process.
Grinding and Emulsifying
Grind the lean pork and the grinding portion of back fat through a 4.5 mm plate first, then grind it a second time through the finest plate your grinder has (typically 3 mm). You want a paste with no visible meat fibers.
For a true mortadella texture, the ground meat needs one more step. Transfer it to a food processor in batches and process until completely smooth, adding ice water a little at a time to keep the temperature down. Mix in the salt, curing salt, binder, and ground spices during this stage. The goal is a sticky, pale pink paste that holds together when you press it between your fingers. Each batch takes about 2 to 3 minutes of processing. If you have a stand mixer with a paddle attachment, you can use that instead, running it on medium speed for 5 to 8 minutes after grinding.
Once the emulsion is smooth, fold in the whole black peppercorns and pistachios by hand so they stay intact.
Preparing the Fat Cubes
The visible white fat cubes are what give mortadella its signature appearance. Cut the reserved back fat into roughly ¼-inch dice. Blanch these cubes in boiling water for 3 minutes, then immediately transfer them to an ice bath. Blanching firms the fat so the cubes hold their shape when mixed into the paste and don’t melt out during cooking. Pat them dry and gently fold them into the meat emulsion, distributing them as evenly as you can without overworking the mixture.
Stuffing the Casing
Traditional mortadella uses a beef bung cap, a natural casing with a diameter of 4½ to 5 inches and a length of 12 to 18 inches. One cap holds about 7 to 10 pounds of meat depending on how tightly you pack it. Soak the casing in warm water for at least 30 minutes before stuffing to make it pliable.
Use a sausage stuffer with the largest tube that fits inside the casing. Pack the meat in slowly to avoid air pockets, which create voids and uneven cooking. If you see a bubble, prick it with a sausage pricker or a sterilized pin. Tie the open end tightly with butcher’s twine, then tie a loop at the top for hanging.
If you can’t find beef bung caps, synthetic fibrous casings in 4- to 5-inch diameter work as an alternative. They’re easier to source online and give a similar shape, though they peel off rather than being eaten.
Cooking Low and Slow
Mortadella is cooked at a low temperature to keep the emulsion stable. Preheat your oven or smoker to 170°F (77°C). Place the stuffed sausage on a rack set over a sheet pan, or hang it if your setup allows. Some recipes start with a brief period of dry heat at around 150°F (65°C) for the first hour to set the casing surface before bumping up the temperature.
Cook until the internal temperature reaches 160°F (71°C), the USDA safe minimum for ground meat and sausage. For a 5-inch diameter mortadella, this takes roughly 6 to 10 hours depending on the exact size and your oven’s accuracy. Use a probe thermometer inserted into the center to monitor progress. Don’t rush it by raising the oven temperature. Cooking too hot will break the emulsion and render out the fat, leaving you with a dry, crumbly sausage surrounded by a pool of grease.
Cooling and Storing
Once the sausage hits 160°F internally, remove it and plunge it into an ice water bath to drop the temperature as quickly as possible. This rapid cooling firms up the fat cubes, tightens the texture, and moves the sausage through the bacterial danger zone fast. Leave it submerged until the internal temperature drops below 40°F (4°C), which typically takes 30 to 60 minutes for a smaller log, longer for a full-size one.
Pat the mortadella dry, wrap it tightly in plastic wrap, and refrigerate. It benefits from at least 24 hours of rest before slicing, which lets the flavors meld and the texture set fully. Stored in the fridge, a whole unsliced mortadella keeps for 2 to 3 weeks. Sliced portions should be eaten within a week or vacuum-sealed for longer storage. You can also freeze it for up to 3 months, though the texture softens slightly after thawing.
Troubleshooting Common Problems
If your mortadella comes out grainy or crumbly, the emulsion broke during processing. This almost always means the meat got too warm. Next time, keep everything colder and add more ice water during the food processor stage.
If the fat cubes melted into the paste and disappeared, either the blanching step was skipped or the oven ran too hot. A reliable oven thermometer is worth the small investment.
If the sausage has large air pockets when sliced, pack more carefully during stuffing and prick any visible bubbles before cooking. Some makers also tie the casing at intervals with twine to compress it and push air out.
If the texture is rubbery, the binder ratio may have been too high. Stick close to 3% of total meat weight for the milk powder or alternative binder, and avoid over-processing in the food processor once the paste is already smooth.