To make these delicious bars gluten-free. Simply swap the all-purpose flour. In both the shortbread crust. And brownie layer with a gluten-free flour blend. Be sure to choose a flour blend specifically designed for baking. To maintain the structure. And the texture of the bars. The rest of the ingredients. Including the ganache. Are naturally gluten-free. So you can enjoy these rich, decadent treats. Without the worry!