To make these Cheesecake Brownies gluten free, replace the all-purpose flour with a reliable 1:1 gluten-free baking flour blend that includes xanthan gum or a similar binder. Also confirm that the chocolate, chocolate chips, vanilla extract, and any packaged ingredients are labeled gluten free, since brands may vary or be processed in shared facilities. If your gluten-free flour blend does not already contain a binder, you may need to add a small amount of xanthan gum to help maintain the brownie texture. For anyone with celiac disease or severe gluten sensitivity, use clean pans, bowls, spatulas, foil, and cutting tools to avoid cross-contact.