Gluten Free Starch Substitute: Potato, Tapioca, Corn, Arrowroot, Rice

I have been inundated with requests for starch and flour substitutions for my recipes as well as recipes that originate from elsewhere. Today I’ll answer the questions on which gluten free starch substitute to use in different scenarios.

Also, see my Gluten Free Substitutions Page,

Gluten Free Baking with Starches

Starches lighten, inflate, and soften gluten free baked goods. It is always best to bake with 2 different types of starches. Each one provides something a little different. Using 2 different types of starch also improves flavor, as well as texture. In gluten free baking, you usually need to use gluten free flour(s), as well as starch(es). However, in some cases you will find that a recipe may call for just one flour such as glutinous rice flour, or sweet rice flour, which contain much starch. In rare cases, you will find the use of starch alone, without any flours, but this usually is called for when using yeast, such as in bread recipes.

When converting gluten recipes to gluten free, a high quantity of starch is usually needed to create a similar texture. Note that additional liquid is often needed because starches absorb more liquid than gluten flour. As you read below, you will discover which starches to use for which purpose.

Potato Starch

Potato starch is known to lighten gluten free baked goods and provides a bit of a chew. Though potato starch does help aid baked goods in rising, it provides less of a rise than tapioca starch. Potato starch is best used in combination with tapioca starch. However, if you are tapioca intolerant, cornstarch is the best substitute, and Bob’s Red Mill makes one that is non-GMO (not genetically modified).

Note: Potato starch and potato flour are 2 separate ingredients. Starch is starch, chewy in texture, yet lighten baked goods. Flour is just that, though heavier than rice flour.

Tapioca Starch

Tapioca flour/starch is known for its unique characteristics to lighten, inflate, and aid in browning, more than potato starch and cornstarch, and provides a more chewy texture. When used with yeast it speeds up the rising process and must be watched carefully. You never want to over-rise a bread for risk of it falling or caving in upon cooling. Cornstarch makes the best substitute for tapioca starch, though it lacks browning characteristics.¬†It doesn’t rise as high as tapioca flour, but using a¬†mixture of fava bean flour and cornstarch may be the best choice.

Note: Tapioca flour and tapioca starch are the same thing. They are just labeled differently by some manufactures. It is also known more commonly by tapioca flour, but also by cassava, yuca, aipim, mandioca, and boba.


Cornstarch is one of the lightest starches. Cornstarch is usually recommended as a substitute for potato starch. However, due to my allergies to tapioca I find it makes an excellent substitute for tapioca starch, as well. It does not, however, aid in rising as much as tapioca starch/flour. It also provides more crispness to your baked goods. They are very similar in weight, but cornstarch provides more flavor. As is with tapioca starch, when using cornstarch along with yeast, watch the rising period carefully, as it may over-rise and spill over the pan, ruining your bread. It all depends upon your other ingredients. If using cornstarch as a substitute for tapioca flour, I suggest adding additional leaveners such as baking powder or baking soda.

Corn in general, is not the healthiest of foods, however, if you are going to use it, I suggest using a non-GMO brand such as Bob’s Red Mill.

Corn and Potato Allergies

If are allergic or intolerant to both corn and potatoes, try substituting tapioca flour for either one, however, the recipe will be chewier. When large amounts of corn and/or potato starch are called for in a recipe, increase other gluten-free flours, such as sorghum, buckwheat, or millet, for a small portion of the potato or cornstarch. When a recipe calls for rice flour, because it is extremely high in starch (carbohydrates), do not increase the rice flour at all. Instead, use equal amounts of tapioca flour for potato or cornstarch. However, no matter what you use, the recipe will not result in the same texture.


Due to my allergy to tapioca, tapioca flour/starch (both are the same) is out for me. In addition, my digestive system is not fond of corn; therefore, cornstarch is not my best option. That leaves potato starch, arrowroot powder, and rice starch. Arrowroot is the easiest to digest out of all of the gluten free starches. It is known by the names arrowroot powder, flour, or starch. You will find many articles stating that arrowroot may be substituted for tapioca flour/starch cup for cup. While this is true, expect a couple of changes. Arrowroot powder absorbs more liquid than tapioca flour. This can result in either a better crumb texture or your baked goods will turn out too dry or heavy. When substituting arrowroot flour for tapioca flour, first substitute it cup for cup. If the batter or dough becomes too thick, add additional liquid as needed. Better yet, bake it as is, and discover if the crumb texture has improved.

My first experiment with arrowroot powder as a substitute for tapioca flour/starch was in my Gluten Free Oat or Sorghum Bread recipe. I was concerned at first. When I first opened the package the aroma of the arrowroot powder reminded me a little of anise or black licorice. However, when mixed with the oat flour, potato starch, egg whites, and other ingredients. I did not taste any difference in flavor compared to using tapioca starch. The rising time was about the same, as well. The differences I noticed were during the baking. It rose just a tad slower and not at all during the baking process. When using tapioca starch/flour, it continued to rise during the baking process. You need to allow the bread to rise to the desired height you would like in the finished product. In addition, the baking time had to be extended. My oat bread took 20 additional minutes.

As a side note, when baking bread, never bake it until it looks done as it must be baked past that point, at least in most recipes. You can always cover it with aluminum foil to prevent over-browning. How do you know when it is done? If it begins to sink in on the sides and/or bottom during the cooling process, pop it back in the pan and back in the oven for 15-20 minutes, or more.

But I digress. Back to arrowroot powder…Previously I had experimented with a gluten free rice bread recipe using only arrowroot and rice flour, no other starches, and egg white and water. I used half flour and half arrowroot. It turned out heavier than when using tapioca and potato starch. The person I was creating it for had a unusually long list of food allergies. It was edible but just starchier than my other gluten free bread recipes. I had followed the baking time for my original recipe, but have since learned it must be baked longer. The additional baking time helps dry out some of the starch.

If you are allergic to both corn and potato, in baking, use a ratio of two parts tapioca to one part arrowroot.

UPDATE: I have recently created a soft Gluten-Free Potato-Free Corn-Free Bread Recipe you may enjoy using arrowroot and tapioca flours.

Rice Starch

Though rice starch is recommended for thickening sauces, I find it too grainy. I do not recommend it for this purpose at all.

Most starches used for thickening gravy become too thin once heated a second time or stored in the refrigerator or freezer. I find that an all-purpose gluten free flour containing added gums (xanthan or guar) works well  for thickening gravy and sauces. However, the best and easiest to use is brown rice flour. It does not create lumps in your gravy, and all you have to do is sprinkle it in the sauce. There is no need to create a slurry with water. You may also use white rice flour. Because brown rice flour is less gritty, I tend to you use it instead of white. The only difference is that with brown rice you only have to cook it for 2 minutes, just as you do with wheat flour. White rice tends to take about 3 minutes.

Again, I digress. I used rice starch in a bread recipe once; however, it was not pleasant at all. It turned out exceptionally heavy and extremely chewy, more so than the arrowroot powder. I do plan to experiment with it on its own as it contains flour and starch properties, much like sweet rice flour.


If you can tolerate tapioca starch and potato starch, together they make the best combination for gluten free baking. If you must use a substitute for either, use cornstarch. Cornstarch the best starch to use on its own, without any gluten free flour. If you decide to avoid all of the above starches use glutinous rice flour, also known as sweet rice flour.

Due to the high amount of starch in gluten free food, consider using more whole grain flours such as sorghum, brown rice, millet, teff, and more.

To learn more about the science behind starches visit

33 Replies to “Gluten Free Starch Substitute: Potato, Tapioca, Corn, Arrowroot, Rice”

  1. Looked through your substitutions info but didn’t come across my question. I’ve got a bag of Expandex Tapioca Starch. Can I use that 1 for 1 as a substitute for regular Tapioca Starch or in some way as a replacement or do I have to stick with using the Expandex in recipes that uniquely call for it? I do appreciate your assistance.

    1. Hi Jean,

      If you referring to the actual Expandex brand and not a substitute currently on the market, then Carol Fenster’s article should be able to steer you in the right direction – In addition, you can find my Expandex recipes here – .

      I experimented with Expandex a few times but decided because my baked goods were tasteless, I was afraid it was too overly processed. In addition, after further research, I discovered chemicals are allowed in its processing. While the current brand on the market boasts being non-GMO, chemicals are still allowed in the labeling of non-GMO products (not organic products though).

      Thanks for your question!


  2. Thank you for sharing these substitution wisdoms! My son has wheat, potato, nuts, soy and variety of other allergies. I have been at a loss on how to substitute for the potato starch I see in most recipes. Thank you.

  3. I have an intolerance to gluten, brown rice, tapioca, and honey (among other foods). I was buying a bread that didn’t have any of these ingredients, but they changed their recipe, and it now has honey, so I am researching bread machines and recipes. Most recipes call for tapioca and/or brown rice flour. If one calls for both cornstarch and tapioca, can I just increase the amount of cornstarch, or is there an alternative? Thank you!

  4. Since you’re allergic to tapioca flour do you have an all purpose blend flour you use to make certain things such as breads, muffins,and such? If so could I have the recipe? Thank you.

  5. thanks for these helpful hints. I can’t have potato, tapioca, or white rice. Any suggestions for substitutions when making a flour blend?

  6. I have a nut allergy, I see many gf recipes with almond flour, what can I substitute for it?
    I love your recipes, saved many on zip list! Thank you so much!

  7. I’m looking for ways to substitute almond flour and garbanzo/ chickpea flour rather than the rice, tapioca, or cornstarch. Any experience with them?

  8. Thank you for all the information about the different starches/flour. I disagree about your review of using rice flour as a thickener. I use it ALL the time to make gravies and as a thickener. I use Bob’s Red Mill White Flour. I have had continual great success – so much so that gluten-eaters don’t recognize there is a difference. BRM White Rice Flour has been a staple in my pantry for the last two years. (I have used the GF multipurpose flour and it has worked okay, but I still prefer the aforementioned.)

  9. Can possibly Coconut Flour replace Starch? It’s a little lighter than most Gluten free Flours along with more eggs. Usually 1/4 cup of Coconut Flour per 1 cup of any other type of flour. And if the recipe calls for 3 eggs, add one more for 1/4 cup of Coconut Flour. Just a thought, don’t know if it works, but thought I would through it out there.

    1. Hi Catgross,

      I haven’t tried baking with coconut flour much, just because I am allergic to it. When I have baked with it I never would have tried it as a substitute for a starch because it is high in oil. Sorry I couldn’t be more help.


  10. My husband is also diabetic and the starches cause his blood sugar to skyrocket. I am looking for gluten free not using any starches. So, can you tell me what to substiture for the tapioca, cornstarch and potato starches? I have bee using almond flour, coconut flour and flaxseed. The taste is a little strong. I would love to have a recipe for gluten free sour dough bread made with gluten free starter – with no starches.

    thanks for any help

    1. Hi Judy,

      I understand how your husband must react to high starches since he has diabetes. It is best to balance out the net carbs by using lots of high fiber ingredients like whole psyllium husk or powder form. See this article I wrote for to find more high fiber ingredients:

      Adding more gums can make up for the chewiness of tapioca starch. Using lots of eggs to replace the starches will also help. Try sorghum flour or rice flour with lots of eggs and a tad bit more gum when it calls for tapioca flour/starch. Both these flours are mild in flavor (though a few people don’t like sorghum alone).

      Once I perfect my regular gluten free sourdough recipe, I’ll keep a starch free one in mind.

      Good luck!

  11. Thanks for this great information! I’m gluten AND potato intolerant, which is a challenge. Also I have discovered that I react to tapioca starch/flour because it seems to be ‘contaminated’ by potato. My naturopathic doctor’s test results show that Bob’s Red Mill tapioca tests positive for potato. (I am guessing because of crop rotation.) So I can’t use potato or tapioca starches. Can I substitute corn starch and arrowroot (in combination) for potato and tapioca starches with good results? Or better yet, do you know of a supplier of tapioca that is potato free? :) Thanks so much!

    1. Hi Vicki,

      I haven’t used potato starch a lot, but have found it to be stickier than tapioca starch. In replacing tapioca I suggest using a little less arrowroot. Cornstarch makes an excellent substitute for potato starch.

      Thank you for sharing the information about Bob’s Red Mill tapioca flour. Your doctor sounds like she knows her stuff. I would like to speak with him or her. Could you provide their contact information? You can email me via the contact form:


  12. I can’t have potatoes or Corn at the moment, is there another starch to substitute in a recipe that calls for tapioca starch and potato starch?


    1. Leslie,

      You can substitute additional tapioca flour/starch for the potato starch, however, it will rise much more. Which recipe are you looking at and I may be able to help you adjust it accordingly?


  13. Thanks for the info! I’m making gingersnaps and my recipe calls for sorghum, tapioca starch and potato starch but I’d like to replace the potato with cornstarch. I read somewhere that you can evenly swap the two but I’ve also been reading about the merits of baking by weight and potato starch is heavier (170 g per cup) than cornstarch (128 g per cup). So if a cookie recipe calls for a cup of potato starch (170 g) would I use a cup of cornstarch (128 g) or increase the cornstarch to 170 g? Hope that makes sense! Thanks in advance!

  14. I don’t want to use starches as diabetes run in my family and starch is not good for you. There must be something else you can use in no gluten flour mixes.

  15. Thank you! My son has arthritis and celiac. We are about to embark on a night shade free diet….so I have to say good bye to my beloved potato starch. I use Carol Fensters recipe for pizza crust and I will first try cornstarch and then arrowroot to test the difference.

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