To make these Blueberry Cake Donuts gluten-free. Substitute the cake flour. With a high-quality gluten-free flour blend. Ensure the blend contains xanthan gum. Or a similar binding agent. To maintain the right texture. Be cautious when mixing the dough. Gluten-free flours can be more delicate. Allow the dough to chill as directed. Which will help it firm up. And be easier to handle. The rest of the process remains the same. Ensuring you get fluffy, delicious donuts. That are safe for those with gluten sensitivities. Or celiac disease. Enjoy your gluten-free donuts. With the same delightful blueberry flavor. And tender crumb!