Yes, baking kills salmonella. The heat of a standard oven is more than sufficient to destroy the bacteria, provided the food reaches a high enough internal temperature and stays there long enough. The critical threshold is 150°F (65.5°C) held for at least 12 minutes, which reduces salmonella to undetectable levels. Most baked goods far exceed that temperature by the time they’re done.
That said, the answer gets more nuanced when you consider what you’re baking, how wet or dry the batter is, and whether every part of the food actually hits that temperature. Here’s what matters.
How Heat Destroys Salmonella
When salmonella cells are exposed to temperatures well above 140°F (60°C), their cell membranes break down and begin leaking. The cells don’t burst dramatically. Instead, small molecules seep out through the damaged membrane, and the bacteria die. Proteins inside the cells also lose their shape and stop functioning, a process called denaturation. The combination of membrane damage and protein breakdown is what makes heat so effective.
Time and temperature work together. At 150°F, salmonella populations of 10 million per gram drop to undetectable levels in about 12 minutes. At 140°F, the same result takes 78 to 83 minutes. Higher heat means faster killing. Since most ovens are set between 325°F and 425°F, the surface and outer layers of baked goods reach lethal temperatures quickly. The center takes longer, which is why internal temperature is what actually matters.
Where Salmonella Hides in Baking Ingredients
Two common baking ingredients carry salmonella risk: eggs and flour.
Eggs are the more well-known source. Salmonella can be present inside the egg itself, deposited before the shell forms. Contaminated eggs are the single most frequent cause of salmonellosis in home kitchens. The USDA recommends cooking egg dishes to an internal temperature of 160°F (71°C), and cooking whole eggs until both the yolk and white are firm.
Flour is less obvious but equally important. Most flour is sold raw, meaning it hasn’t been treated to kill pathogens. The CDC explicitly warns that flour can harbor both salmonella and E. coli, and that these germs are only killed when flour is baked or cooked. This is the main reason health agencies warn against eating raw cookie dough or cake batter, even if the recipe uses no eggs.
Fully Baked Goods Are Safe
A cake, loaf of bread, or batch of cookies baked according to a standard recipe will reach internal temperatures that destroy salmonella many times over. Research on brownies illustrates this clearly. When brownie batter contaminated with salmonella was baked at 350°F for 40 minutes, the internal temperature climbed past 200°F and salmonella populations dropped by more than a millionfold, well below detectable levels. Even at 25 minutes of baking, the reduction was large enough to ensure safety given the contamination levels you’d realistically encounter in home baking.
The key detail: after just 10 minutes of baking at 350°F, the center of the brownies had only reached about 145°F. It took 20 minutes to hit 197°F. So the early portion of baking isn’t doing much pathogen killing in the middle of the pan. The full bake time matters.
When the Center Doesn’t Get Hot Enough
The risk shows up in foods that are intentionally underbaked or have a gooey center. Think molten chocolate cakes, soft-baked cookies pulled early, or French-style preparations where the interior stays custardy. If the center of the product never reaches 150°F for a sustained period, salmonella from flour or eggs could survive.
Low-moisture ingredients make this problem worse. When salmonella is in a dry environment like flour, it becomes significantly more heat-resistant. USDA research has shown that reduced water activity triggers stress-response mechanisms in the bacteria, allowing them to survive higher temperatures than they normally would. This means a slightly underbaked cookie with contaminated flour poses more risk than you might assume based on standard temperature guidelines alone. The bacteria are harder to kill precisely because the flour is dry.
Your Oven Type Doesn’t Change the Outcome
Whether you use a conventional oven, a convection oven, or an air fryer, the end result for salmonella is the same. Research comparing convection ovens and air fryers found no difference in salmonella inactivation between the two, even though the actual temperatures inside the appliances varied by nearly 30°C from their set points. The convection oven ran cooler than its setting; the air fryer ran closer to its displayed temperature.
Of the three factors tested (appliance type, cooking temperature, and cooking time), cooking time was the most important for killing bacteria. Air fryers may heat food surfaces faster due to concentrated airflow, but once you’ve baked for the full recommended time, the appliance doesn’t matter. Follow your recipe’s time and temperature, and the salmonella question is settled.
How to Verify Your Baked Goods Are Done
For items where doneness is hard to judge visually, an instant-read food thermometer is the most reliable tool. Insert it into the thickest part of the food, reaching the center. For egg-based dishes like quiche or frittata, check multiple spots and look for 160°F throughout. Casseroles should hit 165°F at the center.
For cookies and thin baked goods, a thermometer is less practical. Instead, follow the recipe’s bake time and look for visual cues: set edges, a dry-looking surface, and spring-back when lightly touched. If you’re baking something intentionally gooey, the safest approach is to use pasteurized eggs and heat-treated flour. Pasteurized eggs, available as liquid eggs or in-shell, eliminate the salmonella risk from eggs without meaningfully changing the taste or texture of the final product. Heat-treated flour (sometimes sold as “cookie flour” or made at home by microwaving flour to 165°F) addresses the other half of the equation.
Raw Dough Is the Real Risk
The baking itself isn’t where most people get into trouble. It’s the nibbling before baking. Tasting raw batter, letting kids lick the bowl, or eating homemade playdough made with uncooked flour are the scenarios that actually lead to illness. Salmonella from contaminated flour or eggs is fully viable in raw dough at room temperature, and even a small taste can deliver enough bacteria to cause infection.
If you want to eat cookie dough safely, either use a recipe specifically designed for eating raw (with heat-treated flour and pasteurized eggs or no eggs at all), or simply bake the dough fully. Once it’s been through the oven for the recommended time, salmonella is gone.