This recipe is naturally gluten free as long as all packaged ingredients are certified gluten free. Be sure to check the labels on the vanilla extract, ground cinnamon, raisins, and any other packaged ingredients for hidden gluten or cross-contact warnings. Also confirm that the rice and heavy cream are processed in a gluten-free facility if needed for strict gluten-free diets. No flour or gluten-containing thickeners are required for this recipe, so no ingredient substitutions are necessary.