Hi Melissa. Unfortunately, we do not have a specific ratio of those three flours we can suggest to use in place of our Gluten-Free Measure for Measure Flour. While this flour is a blend of rice flour and starches, the most important ingredient for binding and using as a 1-for-1 flour would be the addition of Xanthan Gum. To read more on this ingredient, visit our blog article on A guide to xanthan gum. We hope this helps, Happy Baking!

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