Is all microwave popcorn gluten-free?

Gluten is a protein found in grains like wheat, barley and rye. For people with celiac disease or non-celiac gluten sensitivity, consuming gluten can cause serious health issues like abdominal pain, bloating, diarrhea and fatigue. Because of this, following a strict gluten-free diet is extremely important for managing these conditions.

Many pre-packaged and processed foods contain hidden sources of gluten. So checking labels and ingredients carefully is necessary when grocery shopping and eating out. Microwave popcorn has long been a popular and convenient snack. But is it guaranteed to be gluten-free? Or does microwave popcorn contain hidden gluten?

What is Microwave Popcorn?

Microwave popcorn refers to popcorn packages designed to be heated and popped in the microwave oven. It consists of popcorn kernels that have been pre-packaged along with oil and seasoning.

Microwave popcorn utilizes a special bag with a microwave energy interactive material lining that absorbs and focuses heat. This allows the popcorn to pop when placed in the microwave. The packaging also contains seals and vents that are designed to hold the popcorn contents securely while also releasing excess pressure and steam.

Most microwave popcorn bags are folded flat and made up of multiple layers including:

  • An inner heat-resistant bag or pouch to hold the popcorn kernels, oil and seasoning
  • A microwave interactive layer made up of metal or metal-like material that absorbs and concentrates microwave energy
  • An outer paper layer with graphics and nutritional information

When placed in the microwave, the interactive layer heats up first which then heats the popcorn kernels and oil to start the popping process. The inner pouch helps prevent any kernels, steam or oil from escaping while allowing melted fat and flavoring to evenly coat the popcorn.

Microwave popcorn first hit the market in the early 1980s. It quickly became popular given its convenience and how simple it was to prepare compared to conventional stovetop popcorn. Today there are many brands and flavors of microwave popcorn available at grocery stores and supermarkets.

Common Ingredients in Microwave Popcorn

While ingredients can vary somewhat by brand, there are certain core components found in most microwave popcorn:

  • Popcorn kernels – This is the main ingredient. Most microwave popcorn uses a specific kernel hybrid called “butterfly” that pops up light and fluffy.
  • Oils – Typically contains vegetable oils like soybean, canola or sunflower oil to evenly distribute heat and add texture.
  • Seasonings and flavorings – Ingredients like salt, butter flavoring, and powdered flavors to add taste. Some use artificial flavorings while others use natural options.
  • Preservatives – Preservatives like TBHQ may be added to increase shelf life and retain freshness.
  • Corn syrup – Small amounts of corn syrup help the seasoning adhere to the kernels.

Many brands also offer additional toppings and coating options:

  • Butter topping – Can be powdered butter flavoring or real butter.
  • Cheese powder – Powdered cheese or nacho flavoring.
  • Caramel coating – Coats the popcorn in a sweet glaze.

Understanding all the potential ingredients in microwave popcorn is important when it comes to assessing gluten content and safety.

Which Ingredients Contain Gluten?

Many of the core ingredients in standard microwave popcorn, such as the popcorn kernels, oil and corn syrup are naturally gluten-free. However, some additional ingredients may introduce sources of gluten:

  • Maltodextrin – This additive made from starch can be derived from wheat and contain gluten. Maltodextrin may be listed on ingredient labels as “maltodextrin (wheat).”
  • Hydrolyzed wheat protein – Adds flavor but contains gluten.
  • Soy sauce powder – Can contain wheat and gluten.
  • Barley malt – Contains gluten.
  • Flour – Wheat flour contains gluten. Microwave popcorn may use wheat flour in the seasoning blend.
  • Wheat starch – Another possible source of gluten in seasoning mixes.

The flavorings and powdered cheese can also introduce gluten depending on the exact ingredients. So checking the label is key.

Additionally, microwave popcorn labeled as “gluten-free” would not contain any of these gluten-containing additives. Any ingredients derived from wheat, barley or rye must be avoided.

Cross-Contamination Risks

Even if the ingredients listed on a package of microwave popcorn are gluten-free, there is still the possibility of cross-contamination occurring during manufacturing and processing.

Shared equipment, processing areas and storage facilities increase the risk of gluten exposure. For example, popcorn that does not contain wheat-based ingredients could still pick up traces of gluten if it is produced alongside other snacks with gluten, like crackers.

Some people who are highly sensitive may react to these small amounts of cross-contact gluten. Those with celiac disease need to be especially cautious when selecting processed foods like microwave popcorn.

Manufacturers may label popcorn as “processed in a facility that also processes wheat” or include a “may contain wheat” disclaimer to indicate potential cross-contamination. Choosing brands that are certified gluten-free can help avoid this uncertainty.

Are the Major Microwave Popcorn Brands Gluten-Free?

Many of the top-selling microwave popcorn brands offer at least some gluten-free flavored varieties:

Orville Redenbacher’s

  • Their plain popcorn uses ingredients that are gluten-free.
  • Some flavors contain gluten, like Cheddar and Caramel Popcorn.
  • Orville Redenbacher’s Movie Theater Butter is labeled gluten-free.

Pop Secret

  • Plain popcorn and original flavorings are gluten-free.
  • Some varieties contain wheat-based ingredients and are not gluten-free.

Act II

  • Act II’s original flavor microwave popcorn is gluten-free.
  • But other flavors like Butter Lovers contain gluten sources.


  • This brand offers many gluten-free flavors like Sea Salt and White Cheddar.
  • Angie’s products are produced in a dedicated gluten-free facility.

It’s important to still verify ingredients and labelling when purchasing these mainstream brands, especially for flavored varieties. Some may be gluten-free while others are not.

Specialty Gluten-Free Popcorn Brands

In addition to the major brands offering some gluten-free popcorn options, there are also smaller specialty brands producing microwave popcorn specifically for the gluten-free market:

Pop It Up

  • All their popcorn is certified gluten-free and nut-free.
  • Pop It Up uses a dedicated facility and equipment for their popcorn.
  • Flavors include Vegan Cheddar, Sweet & Salty Kettle Corn, Rosemary and Olive Oil.

Popcorn Indiana

  • Offers both regular and gluten-free varieties.
  • Their gluten-free flavors are produced in a separate facility.
  • Flavors like Kettlecorn, Sweet & Salty Kettlecorn and Roasted Summer Corn are gluten-free.


  • Specializes in gluten-free microwave popcorn.
  • Flavors include Sea Salt, Parmesan & Rosemary and Aged White Cheddar.
  • Uses cooking procedures that avoid cross-contamination.

These brands cater specifically to gluten sensitivity and celiac concerns. Their products are widely available in stores and online.

Be Cautious With Bulk Microwave Popcorn

Another microwave popcorn option that is becoming more popular are bulk self-serve popcorn machines located in supermarkets and some specialty stores.

Customers can scoop and bag their own popcorn then heat it in the microwave. However, this can pose some risks in terms of gluten exposure:

  • Higher chance of cross-contamination since many customers use the same scoops and containers.
  • Difficult to verify ingredients since they may not be clearly labeled.
  • Seasonings and flavor shakers could become cross-contaminated from repeated use.

Unless these machines are specifically labeled gluten-free with designated scoops and bags, it’s best to avoid bulk microwave popcorn. The uncertainty around ingredients and protocol make it too risky.

How to Choose Safe Gluten-Free Popcorn

When selecting microwave popcorn, check for the following characteristics:

  • Verify all the ingredients listed are gluten-free.
  • Look for a “gluten-free” label on the package.
  • Check if the product is made in a dedicated gluten-free facility.
  • Contact the manufacturer if you have any questions.
  • Stick to reputable gluten-free brands if you have celiac disease or are highly sensitive.

Also look at the labelling and allergen information for any statements on where the popcorn was processed and packaged to assess cross-contamination risks.

Plain popcorn from most leading brands is typically safe. But flavored varieties require closer inspection and caution. When in doubt, avoid those that include wheat, barley or malt ingredients.

Homemade Microwave Popcorn

For those with celiac disease or who are extremely gluten-sensitive, making your own microwave popcorn at home may be the safest option.

This avoids any risk of cross-contamination and you can control all the ingredients. Here is a simple homemade microwave popcorn recipe:


  • 1/3 cup unpopped popcorn kernels
  • 1 brown paper bag
  • 1 tablespoon oil (coconut, avocado or olive oil work well)
  • Desired seasonings – sea salt, nutritional yeast, garlic powder, etc.


  1. Combine the kernels and oil in the brown paper bag.
  2. Fold over the top of the bag 2-3 times to seal it while still allowing venting.
  3. Microwave on high for 2 1/2 – 3 minutes, until popping slows to 1-2 seconds between pops.
  4. Remove from microwave, add seasonings, and shake bag to distribute.
  5. Open bag carefully to avoid burns and enjoy!

This simple microwave popcorn recipe lets you control ingredients. Plus you can experiment with alternative gluten-free flavors.

Is Popcorn Itself Naturally Gluten-Free?

Popcorn kernels themselves are a naturally gluten-free whole grain. Corn does not contain the gluten proteins found in wheat and grains like barley or rye. So plain popcorn with no added ingredients is safe for those avoiding gluten.

However, as discussed above, many microwave popcorn brands introduce sources of gluten through flavorings, oils and processing aids. Sticking with plain popcorn kernels avoids any uncertainty.

You can air pop kernels stove-top for a quick snack. Though this requires some coconut or olive oil to replicate the microwave popcorn experience.

Risk of Cross-Reactivity with Corn and Popcorn

In some rare cases, people with celiac disease or non-celiac gluten sensitivity may also react to corn. This is because the protein zein found in corn has some similar amino acid sequences as gluten.

So those who are extremely sensitive can sometimes experience cross-reactivity when consuming corn or corn-based products, including popcorn. Symptoms are similar to gluten exposure.

But this does not necessarily mean all corn foods need to be avoided. Corn cross-reactivity is considered rare. Those who experience consistent reactions to corn should consult their doctor and dietitian.

Is Microwave Popcorn Safe for People with Gluten Intolerance?

For people diagnosed with celiac disease, any amount of gluten can cause an immune reaction and damage to the small intestine. So those with celiac need to be especially strict about gluten exposure from any source, including microwave popcorn.

Those with non-celiac gluten sensitivity may be able to tolerate small amounts of gluten from cross-contamination. But it varies based on individual sensitivity levels. People with non-celiac gluten intolerance also need to check all ingredients carefully and monitor themselves for any symptoms after consuming.

Some with gluten sensitivity can manage popcorn from the major brands that use shared equipment. But people with celiac disease and high sensitivity may need to stick to certified gluten-free options to prevent reactions.

What About Popcorn and Celiac Disease Diagnosis?

When initially diagnosing celiac disease, doctors advise continuing to eat gluten normally for accurate test results. Some people wonder if popcorn consumption could skew results for those being tested for celiac.

In this case, it is wise to avoid regular microwave popcorn or flavored popcorn since many contain gluten sources. Sticking to basic air-popped or stovetop popcorn without added ingredients is less likely to influence testing. But all sources of gluten should continue as normal.

After diagnosis and going gluten-free, microwave popcorn ingredients will need to be checked closely per the guidance in this article. Caution is advised as people are newly adjusting to the gluten-free diet after celiac diagnosis.

Tips for Safely Enjoying Microwave Popcorn

Here are some tips for safely incorporating microwave popcorn into a gluten-free diet:

  • Check mainstream brands for certified gluten-free flavored varieties.
  • Look for gluten-free microwave popcorn options from specialty brands.
  • Make your own homemade popcorn from plain kernels.
  • Try alternative seasonings like nutritional yeast for flavor.
  • Use dedicated popcorn poppers and bags to avoid cross-contact.
  • Contact manufacturers if you have any questions or concerns.
  • Avoid bulk self-serve microwave popcorn machines.

With the right precautions, many people who need to avoid gluten can still enjoy microwave popcorn. Just be vigilant about verifying ingredients and products labeled gluten-free.

The Bottom Line

So is all microwave popcorn gluten-free? The answer is no. Many popular flavored varieties contain gluten sources like maltodextrin, hydrolyzed wheat protein and soy sauce powder. Plus there are risks of cross-contamination during processing.

However, there are gluten-free microwave popcorn options available, including:

  • Plain popcorn from mainstream brands
  • Some flavors designated gluten-free from major brands
  • Specialty gluten-free microwave popcorn companies
  • Homemade popcorn made from corn kernels

Those with celiac disease or a high sensitivity to gluten just need to check labels and ingredients closely, and verify dedicated production. With care, microwave popcorn can still be enjoyed on the gluten-free diet.

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