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How to Make Sweet Potato Flour for Grain Free Baking 

Sweet potato flour is an excellent grain-free, nut-free, and gluten-free flour that can be used in place wheat flour. It's packed with nutrition and has a slightly sweet, earthy flavor that works well in a variety of baked goods. Whether you have celiac disease, food allergies or sensitivities, or are just cutting back on grains and/or nuts, sweet potato flour is a great alternative to all purpose flour that is simple to make at home!
Prep Time 15 minutes
Total Time 12 hours

Equipment

  • 1 Vegetable peeler
  • 1 Cutting board
  • 1 sharp chef knife
  • Smaller wire racks such as cooling rack, as needed

Ingredients

  • 3 lb Sweet potatoes (preferably white is more neutral taste is desired) (makes about 1 to 1 1/2 cups of flour)

Instructions

  • Peel sweet potatoes with a vegetable peeler.
  • Using a secure cutting board and a sharp chef knife, carefully cut sweet potatoes long-ways into very thin slices. Don't worry about them being paper thin or perfectly uniform, but try to aim for between 1/16th to 1/8th inch thick slices.
  • Separate the smaller/shorter pieces ( the slices that would fall through the oven rack) from the longer pieces. Keep in mind that the slices will shrink when they dehydrate.
  • Place the larger pieces in a single layer perpendicular to the oven rack wires. Make sure the oven racks and the bottom of your oven are well cleaned, with no food or chemical residue. Some pieces will likely fall to the bottom once dried.
  • Place the smaller pieces in a single layer on a small wire rack you have, such as a cooling rack or toaster oven rack, and place small rack (or multiple if needed) in the oven beside the larger sweet potato pieces.
  • Set oven to 140 or 150 degrees Fahrenheit.
  • Dehydrate sweet potatoes for about 10-12 hours, or until the thickest pieces snap easily when bent.
  • Transfer dried sweet potatoes pieces from the oven to a large bowl to come to room temperature. (This will probably only take 5-10 minutes).
  • Once cooled, transfer dried sweet potato pieces to a high speed blender or well cleaned spice grinder.
  • Blend until a fine flour is formed.
  • Wait for a couple of minutes for a the flour to settle, then transfer with a rubber spatula to a storage container or add directly to a recipe.
  • Enjoy!