To prepare these pretzels gluten-free, substitute the all-purpose flour with a 1:1 gluten-free baking flour blend that includes xanthan gum. Please note that the dough may have a slightly different texture and may require a bit more flour to handle and shape. Avoid any flour blends labeled "cup-for-cup" without xanthan gum unless you add it separately. Also, verify that your baking powder and pickled jalapeños are certified gluten-free.