To prepare a brown angel iced sweet potato cookies 4845 recipe, first you'll need to prepare the sweet potatoes. First, you will need the following ingredients: Preheat the oven to 375 degrees F (190 degrees C) and grease two 9x9-inch baking pans with non-stick cooking spray. In another large bowl, combine the flour, baking powder, cinnamon, nutmeg and salt. Add the wet ingredients to the dry ingredients and stir to combine. Then, add the butter and mix until the mixture resembles coarse crumbs. Pour the batter into the greased and floured baking sheets. Bake the cookies for 12 to 15 minutes, or until they are lightly browned. Remove from oven and allow to cool for 5 minutes before serving.