2cupssprouted white wheat flourplus more for rolling out
1stickbutterchilled and cut into small pieces, divided
Preheat the oven to 435ºF.
Scrub the potato clean and pierce with a fork. Place the potato on the baking sheet. Bake the potatoes until tender, about 45 minutes.
When the potato is cool enough to handle, remove the skins and mash the potato.
Line a baking sheet with parchment paper or a Silpat liner. Set aside.
In a bowl, combine the flour, baking powder, baking soda and salt. Mix with a fork to combine.
Add butter and mix by hand just until it resembles coarse crumbs.
Add sweet potato and buttermilk. Stir just until the mixture comes together.
Lightly flour a counter and turn the dough out. Gently knead the dough a few times.
Roll the dough into a rectangle about 2 inches thick. Fold one side of the dough over to by 1/2 then fold the other side over the first side. Flatten the dough into another rectangle. Fold the dough again.
Roll the dough one last time to about 1 1/2 inch thick. Using a 2-inch cookie cutter, cut the biscuits, pressing straight down on the cutter, being careful not to twist or turn it. Place the biscuits on the prepared baking sheet. Re-roll the dough the same way you rolled it out the first time (folding into thirds twice) then cut the remaining dough into biscuits. Be sure to cook any dough that is leftover too. End pieces are fun for kids!
Bake the biscuits in the 435ºF oven until they are lightly browned, about 13 minutes.