To make this Classic Pineapple Bars Recipe gluten-free. Simply substitute the all-purpose flour. With a gluten-free flour blend. Ensure that the blend contains xanthan gum. To maintain the right texture. Additionally, double-check that your baking powder. Is certified gluten-free. These simple swaps. Will keep the bars just as delicious. And allow everyone to enjoy them. Even those with gluten sensitivities. This way, you can share these delightful treats. With all your friends and family. Without any worries!