To assemble a gluten-free rendition of Grandma's Buttermilk Cornbread you have the option to supersede the all-purpose flour with a gluten-free flour blend that is expressly made for baking. It's important to choose a blend that's suitable, for baking purposes as some gluten-free flours can have inconsistent textures or absorb moisture differently. Further, make sure to use gluten-free baking soda. By constructing these substitutions you can savor the taste of Grandma's Buttermilk Cornbread while holding it free from gluten.