Are Marshmallows Flammable? Find Out the Surprising Truth!

Marshmallows have been a staple of campfires and s’mores for generations. But did you know that marshmallows can be quite flammable? For anyone who has been to a campfire, you know that marshmallows take on a flame quite easily, but you may not know that they can be dangerous if not handled properly.

In this blog, we will explore the flammability of marshmallows and find out just how dangerous they can be.

What Are Marshmallows?

Marshmallows are a type of soft candy that is typically made from sugar, corn syrup, gelatin, and flavorings. They are often light and fluffy in texture and are commonly sold as small cylinders or cubes.

Marshmallows combine the ingredients in a large pot and heat them until they become thick and gooey. The mixture is then whipped to incorporate air, which gives the mallow its characteristic fluffy texture. The mixture is then poured into a pan and allowed to cool and set before being cut into pieces.

Marshmallows can be eaten on their own as a sweet treat, or they can be used as an ingredient in other desserts and treats, such as s’mores, hot cocoa, and rice crispy treats. Many different flavors and variations of marshmallows are also available, such as strawberry, vanilla, and chocolate.

Are Marshmallows Flammable?

The answer is yes, but it’s important to understand the science behind it. Marshmallows are made up of a combination of sugar, water, and gelatin. That combination creates a highly flammable surface and can ignite when exposed to an open flame.

It’s important to note that marshmallows won’t catch fire if you drop them in the fire. The sugar in the marshmallow will melt and caramelize, but it won’t combust. However, exposing a marshmallow to a flame, like when toasting it over an open fire, will ignite it.

Are Marshmallows Flammable

It’s not just the marshmallow that’s flammable, either. The sticks that many people use to roast marshmallows are also flammable. Most people use wooden sticks, which will combust if they come into contact with an open flame.

Why Are Marshmallows So Flammable?

Marshmallows are flammable because they contain a high amount of sugar and are very light and airy, which makes them very combustible.

When exposed to an open flame or heat source, the sugar in the marshmallow caramelizes and creates a layer of crispy, charred sugar on the outside, while the heat causes the air pockets inside the marshmallow to expand and heat up.

As the air inside the marshmallow heats up, it creates a pressure that eventually causes it to burst into flames.

This is because the heat causes the sugar molecules to break down into carbon, which combines with oxygen from the air to create carbon dioxide gas and water vapor. The carbon dioxide gas feeds the flames, causing the marshmallow to burn.

It’s important to note that while marshmallows can be fun to toast over a campfire, they can also be dangerous if not handled properly.

Always supervise children when toasting marshmallows; use long-handled utensils to hold the marshmallow, and keep a bucket of water or sand nearby to extinguish any fires that may start.

Is Roasting Marshmallows Over A Fire Dangerous?

Roasting marshmallows over a fire can be safe if proper precautions are taken. However, there are some potential dangers to consider:

Burns: Roasting marshmallows involves exposing them to an open flame, which can be very hot. If the marshmallow catches fire or falls off the roasting stick, it can burn someone’s skin.

Fire hazards: The open flame used for roasting marshmallows can also pose a fire hazard, particularly if the fire is not contained properly or if flammable materials are nearby.

Food safety: It’s important to ensure the marshmallows are cooked thoroughly to avoid any risk of foodborne illness from consuming undercooked or raw ingredients.

Why Do Marshmallows Catch On Fire?

Marshmallows catch fire because they are made of sugar, corn syrup, gelatin, and air.

When exposed to an open flame, the sugar in the marshmallow caramelizes and creates a crispy, charred layer on the outside, while the heat causes the air pockets inside the marshmallow to expand and heat up.

As the air inside the marshmallow heats up, it creates a pressure that eventually causes it to burst into flames.

This is because the heat causes the sugar molecules to break down into carbon, which combines with oxygen from the air to create carbon dioxide gas and water vapor.

The carbon dioxide gas feeds the flames, causing the marshmallow to burn.

Burning Marshmallow Chemical Change

Burning a marshmallow is an example of a chemical change. During this process, the heat from the fire causes the sugar molecules in the marshmallow to break down into simpler molecules, such as water and carbon dioxide.

This is a chemical reaction that changes the composition of the marshmallow.

When the marshmallow is exposed to heat, the sugar molecules undergo pyrolysis, which involves breaking down the chemical bonds that hold the sugar molecules together.

As a result, the sugar molecules are transformed into new molecules, including water, carbon dioxide, and other volatile compounds.

These new molecules have different properties than the original sugar molecules and are responsible for a burned marshmallow’s characteristic smell and taste.

How Is Roasting A Marshmallow Considered To Be A Chemical Change?

Roasting a marshmallow is a chemical change because it involves transforming its molecular structure through a chemical reaction.

When a marshmallow is roasted over an open flame, the heat from the fire causes the sugar molecules in the marshmallow to break down into simpler molecules, such as water and carbon dioxide.

This chemical reaction is an example of a chemical change because it alters the composition of the marshmallow at the molecular level.

The original sugar molecules are transformed into new molecules with different properties, including water, carbon dioxide, and other volatile compounds.

What Is The Black Stuff On A Burnt Marshmallow?

The black layer on a burnt marshmallow comprises carbon and other organic compounds released during cooking.

While it is not harmful to eat, the charred layer is typically discarded because of its unpleasant taste and texture.

Some people enjoy the taste of burnt marshmallows and intentionally cook them until they are blackened. This can create a smoky, caramelized flavor that some people find appealing.

Is It OK To Burn Marshmallows?

Eating a burnt marshmallow is generally safe, but the charred layer on the outside may not taste very good. Burning a marshmallow does not pose any health risks but can increase the risk of burns or fire if proper precautions are not taken.

When exposed to an open flame, the sugar in the marshmallow caramelizes and creates a crispy, charred layer on the outside, while the heat causes the air pockets inside the marshmallow to expand and heat up.

As the air inside the marshmallow heats up, it creates a pressure that eventually causes it to burst into flames. This is because the heat causes the sugar molecules to break down into carbon, which combines with oxygen from the air to create carbon dioxide gas and water vapor. The carbon dioxide gas feeds the flames, causing the marshmallow to burn.

Is It Safe To Eat A Burnt Marshmallow?

Yes, it is generally safe to eat a burnt marshmallow. However, the charred layer on the outside may not taste very good and could be tough to chew.

The charred layer comprises carbon and other organic compounds released during cooking.

What Happens When Marshmallows Are Heated?

When marshmallows are heated, several things happen. Marshmallows comprise sugar, corn syrup, gelatin, and air; each ingredient reacts differently to heat. Here are some of the things that happen when marshmallows are heated:

The sugar caramelizes: When the marshmallow is heated, the sugar in the marshmallow begins to break down and caramelize. This creates a sweet, toasty flavor and a crispy outer layer.

Gelatin melts: Gelatin is a protein that gives marshmallows their chewy texture. When heated, the gelatin melts and becomes more liquid, causing the marshmallow to become soft and gooey.

Air expands: Marshmallows contain a lot of air; when heated, the air inside the marshmallow expands. This causes the marshmallow to become larger and lighter in texture.

Browning occurs: When heated for an extended period, marshmallows can brown due to the Maillard reaction. This reaction occurs between the amino acids in the gelatin and the reducing sugars in the marshmallow, causing a brown color and a unique flavor to develop.

How To Eat A Marshmallow On Fire?

Eating a marshmallow on fire can be dangerous, so it’s important to exercise caution when doing so. Here are some steps to safely eat a marshmallow on fire:

First, make sure the flame is not too big. If the flame is too big, it can burn you or the marshmallow.

Hold the marshmallow by the end of the roasting stick or skewer, and hold it over the flame. Keep it far from the flame, so it doesn’t catch fire immediately.

Rotate the marshmallow slowly over the flame so that it cooks evenly on all sides. This will help melt the marshmallows inside and create a gooey texture.

When the marshmallow is toasted to your liking, blow out any flames that may be on the marshmallow or around it.

Wait a few seconds for the marshmallow to cool down before eating it. Eating a hot marshmallow can burn your mouth or tongue.

Once the marshmallow has cooled down, gently remove it from the roasting stick or skewer and enjoy it!

Safety Tips While Burning Marshmallow


Here are some safety tips to follow when burning marshmallows:

Choose a safe location: Make sure you are in a safe location away from any flammable materials, such as dry leaves, paper, or wood. It’s a good idea to do it outdoors in a clear area.

Use a long roasting stick or skewer: Use a long roasting stick or skewer to hold the marshmallow over the fire. This will prevent you from getting too close to the flames and getting burned.

Be mindful of the fire: Keep an eye on it and ensure it does not get too big or out of control. Never leave the fire unattended; always have a bucket of water or sand nearby in emergencies.

Don’t hold the marshmallow too close to the fire: Hold it safely from the fire so it doesn’t catch fire too quickly.

Rotate the marshmallow frequently: Rotate the marshmallow frequently to ensure that it cooks evenly on all sides.

Blow out the flame: When the marshmallow is cooked to your liking, blow out any flames on or around it.

Let it cool: Wait a few seconds for the marshmallow to cool down before eating it.

By following these safety tips, you can enjoy roasting marshmallows without putting yourself or others in danger.