Preheat oven to 425°F and make the cinnamon sugar mixture by mixing together the ground cinnamon and organic cane sugar in a small bowl. Set aside.
In a large bowl, whisk together the dry ingredients: brown rice flour, flax meal, ground cinnamon, and salt.
Mix in the water, avocado oil, and maple syrup. Use your hands to stir them together and then knead the dough together until a ball forms. If the dough is too dry, add 1 more tablespoon of water and continue kneading to form a dough. If it’s too wet, sprinkle on a little more brown rice flour.
Divide the dough in half. Place one half back in the bowl covered with a kitchen towel. This helps prevent it from drying out while you roll out the other half.
Place the dough between two pieces of parchment paper and use a rolling pin to roll the dough until it’s about 1/8-inch thick. Remove the top layer of parchment paper and transfer the bottom sheet with the rolled-out dough onto your baking sheet. If any cracks form during the transfer just piece them back together with your fingers.
Sprinkle the cinnamon sugar mixture over the top. Then use a pizza cutter or the tip of a sharp knife to score the dough into little squares (this helps them break apart easily after they’ve baked). Continue this process with the second ball of dough.
Bake one sheet at a time for 13-15 minutes (see notes). Let cool before breaking up any pieces that are stuck together. They'll continue to crisp up as they cool.
Once completely cool, store in an airtight container at room temperature for several days.