To make Chocolate Caramel Shortbread Bars without gluten you can replace flour with a blend of gluten-baking flour that includes xanthan gum. Make sure to use certified gluten-free caramel bits and chocolate chips to prevent any cross-contamination. If the dough feels too dry you can add some butter or milk since gluten-free flour absorbs moisture differently. Lastly taste the bars. Adjust the sweetness or vanilla flavor according to your preference. This way you can savor these treats while following a gluten-free diet.