To prepare these Individual Yorkshire Puddings gluten-free, substitute the unbleached all-purpose flour with a high-quality 1:1 gluten-free flour blend that includes xanthan gum. Ensure that the remaining ingredients, such as beef drippings and bacon drippings, are free from any gluten-containing additives. Allow the batter to rest as directed, as this helps gluten-free flour hydrate fully and achieve a better rise.