In a large mixing bowl, combine all-purpose flour, baking powder, sweet potato puree, melted butter, spices, and grated cheese if using. Stir well and knead the dough by hand for 2-3 minutes until smooth. Wrap in plastic wrap and refrigerate for at least 1 hour.

Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

Remove the dough from the refrigerator and let it sit for a few minutes. Divide into two equal portions and roll out each to about 1/8 inch thick.

Cut the rolled dough into your desired cracker shapes and arrange on the prepared baking sheet.

Bake for 15-20 minutes, flip the crackers, and return to the oven for an additional 10-15 minutes until golden brown.

Let cool completely on the baking sheet before transferring to an airtight container.