To make these Sweet Cinnamon Sugar Poptart Bars gluten-free. Simply substitute the all-purpose flour. With a high-quality gluten-free flour blend. That includes xanthan gum for structure. You can also find gluten-free graham flour. To keep the texture nice and flaky. Ensure your baking powder. And other ingredients. Are certified gluten-free. And follow the rest of the steps as usual. The result will still be buttery, and rich. And just as satisfying!