Start by peeling, chopping, and boiling your sweet potatoes. Cook them until they are very soft, ensuring they can be easily pierced with a fork and effortlessly come apart.
Once your sweet potatoes are tender you can mash them up using a potato masher. Do not leave any lumps behind.
Add the mashed sweet potatoes to a large mixing bowl with the rest of the ingredients (tapioca flour, chia seeds, oil, and salt).
Combine until smooth. You can use your hands for this. The dough should have the consistency of playdough and should not be sticky or breaking apart.
Once everything has come together into a dough, roll it out using a rolling pin. Then, cut it into little pieces, preferably all the same size so they cook at the same rate. (You can use a knife, bench scraper, small cookie cutters or pizza cutter to cut them)
That's it! You can pop a couple into an air fryer. I normally bake them at 325, and it usually takes somewhere between 6-10 min. Time will vary depending on the size of your puffs. I take them out once they have puffed up and are crunchy on the outside. You can leave it a little longer if you like yours to be extra crunchy.
For freezing instructions, place any leftover uncooked puffs on a rimmed baking sheet lined with parchment paper, or plastic wrap and freeze them. Once frozen, transfer them to an airtight container or Ziplock bag