Preheat oven to 325 degrees and line a rimmed baking sheet with parchment paper.
In a large bowl, whisk together sour cream, egg, sugar-free syrup, and golden lankanto. Stir in almond flour, coconut flour, baking powder, and salt. Let sit for 5 minutes.
Using lightly greased hands, form the dough into a large ball and place it on the prepared baking sheet. Flatten it to a 6-inch round disk.
Slice into 6 wedges as if slicing a pizza, then separate the scones evenly across the baking sheet.
Bake for 18-20 minutes, or until they are browned on top. Place the scones on a cooling rack and cool completely before serving.