Tiramisu is safe to eat in most cases, but the traditional version does carry real food safety risks. The main concerns are raw eggs, alcohol that doesn’t cook off, and caffeine from espresso. Whether a particular tiramisu is safe depends largely on how it was made and who’s eating it.
The Raw Egg Risk Is Real
Traditional tiramisu uses raw egg yolks whipped into the mascarpone filling and sometimes raw egg whites folded in for lightness. The dessert is never cooked. It’s assembled cold and set in the refrigerator, which means any bacteria present in the eggs survive intact.
This isn’t a theoretical risk. In one well-documented outbreak published in Communicable Diseases Intelligence, 20 people fell ill with Salmonella after eating tiramisu at a single event. The dessert was made on-site using raw shell eggs, and the statistical association between eating the tiramisu and getting sick was overwhelming: people who ate it were roughly 130 times more likely to become ill than those who didn’t. The tiramisu had been properly refrigerated with no temperature abuse identified. The raw eggs were simply contaminated.
Salmonella infection typically causes fever, vomiting, diarrhea, and stomach cramps that last several days. For healthy adults, it’s miserable but rarely dangerous. For pregnant women, young children, older adults, and anyone with a weakened immune system, the consequences can be severe.
How to Make It Safer
The simplest fix is using pasteurized eggs. Pasteurized shell eggs and liquid pasteurized eggs have been heat-treated enough to kill Salmonella without cooking the egg, so they work perfectly in a no-cook dessert like tiramisu. Most commercial and restaurant-made tiramisus use pasteurized eggs or pasteurized mascarpone cream specifically for this reason.
If you’re making tiramisu at home, look for eggs labeled “pasteurized” at the grocery store, or buy pasteurized liquid egg yolks. Some home cooks heat egg yolks with sugar over a double boiler to around 160°F (71°C) before whipping them into the filling. This kills pathogens while still producing a smooth, creamy texture. Store-bought tiramisu from a reputable brand is generally the safest option, since commercial food production requires pasteurized ingredients.
Alcohol Doesn’t Evaporate
Most tiramisu recipes include Marsala wine, rum, or coffee liqueur. A common assumption is that the alcohol evaporates during refrigeration, but this isn’t true. Ethanol’s boiling point is about 173°F (78°C), and your refrigerator sits around 38°F (4°C). Unlike baking, which can reduce alcohol content by 25 to 75 percent, overnight chilling produces no measurable ethanol loss. The dense cream layers trap the alcohol in place.
A standard slice contains roughly 0.8 to 3.0 grams of pure alcohol, depending on the recipe. For context, a standard drink contains about 14 grams of alcohol, so even a generous slice holds a small fraction of a drink. Most adults won’t notice any effect. But for anyone avoiding alcohol entirely, whether for pregnancy, medication interactions, religious reasons, or recovery, even this small amount matters. Alcohol-free tiramisu is easy to make by simply skipping the liqueur and relying on the espresso for flavor.
Caffeine Content Per Serving
Espresso-soaked ladyfinger cookies are the base of tiramisu, and they deliver a meaningful dose of caffeine. A typical slice contains 30 to 70 milligrams of caffeine, roughly equivalent to half a cup of coffee. A heavily soaked slice made with multiple shots of espresso and extra cocoa dusting can exceed 100 milligrams, putting it on par with a full cup of coffee.
This is worth knowing if you’re caffeine-sensitive, eating tiramisu as an evening dessert, or giving it to children. It’s also relevant during pregnancy, when caffeine intake is commonly kept under 200 milligrams per day.
Lactose and Dairy
Tiramisu is a dairy-heavy dessert. The filling is built on mascarpone cheese, a rich Italian cream cheese. While mascarpone has had some of its whey drained, it still contains lactose. People with mild lactose intolerance may handle a small serving without symptoms, but those with severe intolerance will likely react to it. There’s no practical way to make traditional tiramisu low-lactose without substituting the mascarpone entirely.
How Long It Keeps Safely
Homemade tiramisu should be stored in an airtight container in the refrigerator at or below 40°F (4°C). Under those conditions, it stays safe to eat for about 3 to 4 days when made with good hygiene and pasteurized ingredients. Some sources extend this to 5 days, but quality drops noticeably as the ladyfingers continue absorbing moisture and the layers break down.
Like any perishable dairy dessert, tiramisu should not sit at room temperature for extended periods. The standard food safety guideline of no more than two hours at room temperature applies. If you’re serving it at a party or buffet, keep it cold and return it to the fridge promptly.
Who Should Be Most Careful
For a healthy adult eating store-bought or restaurant tiramisu made with pasteurized eggs, the risks are minimal. The dessert is essentially mascarpone, coffee, sugar, and cookies.
The people who need to pay closer attention are pregnant women (raw eggs, alcohol, and caffeine all apply), young children (caffeine and alcohol), anyone immunocompromised (raw egg risk), and people in recovery from alcohol use (even small amounts of alcohol can be a concern). If you fall into one of these groups, the safest approach is to either make tiramisu at home with pasteurized eggs and no alcohol, or to ask specifically how it was prepared before eating it at a restaurant or event. Many restaurants are happy to tell you whether they use pasteurized eggs.