Does Toasting Bread Kill Bacteria? Amazing Information You Must Know

  • By: Emma
  • Date: August 13, 2022
  • Time to read: 4 min.

If you have ever used a toaster, you would know that a toaster changes the taste and texture of your bread. But does toasting kill bacteria in the bread? This article is loaded with the latest research and updates on this topic. Let’s find out.

Table of Contents

Does Toasting Bread Kill Bacteria?

Yes, toasting can kill most foodborne bacteria, viruses, and fungi. The temperature inside a toaster reaches 310° F, enough to kill bacteria like Salmonella, Clostridium perfringens, Campylobacter, and Staphylococcus aureus. Toasting can also kill Yeast, a fungus, and viruses like Norovirus.

According to a 2021 research published in the journal “Current Opinion in Food Science,” toasting may not kill all kinds of bacteria.

Researchers found that aerobic bacterial spores were not significantly reduced after toasting. Bacteria like Bacillus and Paenibacillus can survive very high temperatures and cannot be killed with toasting.

NameHeat toleranceKilled in a toaster?
170° FYes
160° FYes
155° FYes
180° FYes
140° FYes
150° FYes
Table 1. Does toasting bread kill bacteria? Heat tolerance limit bacteria and other food-borne germs.

In the kitchen, you probably know that using a knife is one of the most effective ways to reduce germs. And you’re probably aware that handling raw or unwashed fruits and vegetables can help you keep your hands clean and free of germs.

Read: Why do microwaves spin?

However, did you know that touching something seemingly innocent as toasting bread can help kill harmful bacteria?

Think about it!

Once you put bread into the oven to heat it up, the moisture released by the yeast inside the bread attracts water vapor from the air around it.

This moisture then condenses onto the surface of the bread, where it combines with fatty acids in butter and other fats in bakeries.

The combination of these molecules creates what is called aldehyde, which has antimicrobial properties.

In other words, once inside your oven and once heated up again, this process continues and releases more antimicrobial molecules from within itself. These new molecules are more potent than those that came out before, making them ideal for killing harmful bacteria like E. coli O157:H7 on your toast!

What do you think? Have you ever noticed how much better your toast tastes after being toasted? Let us know in the comments below!

Five benefits of eating toasted bread.

What are the different kinds of bacteria present in bread?

Bacteria in bread are present in different forms.

While we typically think of bacteria as being found on our skin and in the intestines, they can also be found on our food. And these bacteria can cause a significant amount of problems when they’re left unmitigated.

Read: How to store hard-boiled eggs in shell unrefrigerated? 3 Proven Methods You Must Know

There are a few different types of bacteria that you might find in bread. The most common is E. Coli O157:H7, a type of Escherichia coli that can cause severe illness and even death by entering the body through contaminated food or water.

Other types of bacteria that might be present are salmonella and listeria monocytogenes, which can only be found on bread made from raw dough or batter (no additives like salt).

What temperature kills bacteria in bread?

To kill germs in bread, it is essential to cook it at a specific temperature. When the temperature is too low, you won’t kill the bacteria; when it’s too high, you will likely destroy the bread’s proteins and other vital ingredients.

The ideal temperature for heating up bread is about 200 degrees Fahrenheit. And if you want to toast your bread, keep it between 350-450 degrees Fahrenheit so that the aldehyde can spread over the surface of your toast and kill any harmful bugs.

Does toasting bread kill the mold?

Does toasting bread kill bacteria in the bread? No, it doesn’t. The mold is what kills the bacteria and is not killed by toasting.

What chemical or physical changes occur in bread when it is toasted?

The chemical changes in bread when it is toasted are due to the release of small amounts of molecules called aldehydes from the inside and outside of the bread.

These molecules help kill E. coli and other harmful bacteria on your toast.

What do you think? Have you ever noticed how much better your toast tastes after being toasted?

Let us know in the comments below!

Read: How long to microwave milk to 110 degrees?

How can you tell if there are bacterial or other germs in bread?

When looking for healthy and safe food, it can be difficult to tell if harmful bacteria or other germs are lurking inside. That’s why it is essential to check your bread before eating it.

You can cut a piece of your bread in half and check the inner crumb. If you see mold or anything else unusual, throw away the bread immediately.

How does a toaster work?

Toasters work by having heating elements, usually a coil of wire, attached to the inside of the toaster. This coil works as a transformer that changes electrical energy into heat.

Once the bread is put in, it gets heated and starts toasting. This causes the bread to become dry and crispy on one side and moist on the other.

The moisture contacts the heating element and becomes hot, creating a chemical reaction that releases molecules with antimicrobial properties.


So, does toasting bread kill bacteria? The process of toasting bread kills any bacteria that may be present in the bread. The key to killing bacteria is to heat the bread very quickly and for a long time, which is precisely what a toaster does.