In a large bowl combine the flour, sugar, baking powder, salt, and spices. Add butter and cut in with fork or a pastry cutter until the mixture is the texture of course meal.

In a medium bowl beat an egg slightly, add the mashed sweet potatoes and cream. Add the sweet potato mixture to the dry ingredients and mix with a wooden spoon or by hand until the mixture comes together.

Place the dough on a flour surface and form a 8 to 9 inch circle. Cut the circle into 8 wedges using a knife or my favorite a pizza cutter. Place on a prepared (greased with shortening or parchment paper) baking sheet.

Place scones in an oven that has been preheated to 375 degrees F. Bake for 14 to 15 minutes or until lightly browned.

Remove from oven and cool completely on a cooling rack.

For the icing - combine the powder sugar, salt, cinnamon, cardamom, and butter, mix until combined. Add the heavy cream a tablespoon at a time until you have the right consistency. But until smooth. Drizzle of cooled scones. Enjoy!