To make this Apple Ring-Arounds Recipe gluten-free, use certified gluten-free puff pastry in place of regular puff pastry. Confirm that the powdered sugar, cinnamon, granulated sugar, milk, and egg are gluten-free and free from cross-contamination. Use a clean baking sheet, parchment paper, knife, cutting board, and prep surface to avoid contact with gluten-containing ingredients. If using store-bought gluten-free puff pastry, follow the package thawing and baking directions, as texture and baking times may vary.