Golden Sweet Potato Brownies

I'm not one to cut the chocolate out of a brownie, but this recipe seriously doesn't need it.  Similar to my Sweet Potato Cake with Cream Cheese Frosting, this "brownie" is super moist, wonderfully sweet, with just the right amount of spice.  However, this recipe has more of a moist brownie-like texture than my cake recipe, and the cake part - or should I say "brownie" part - is a little sweeter as well.  These are not crumbly like brownies, though...I guess you could say they are stuck in the middle between a brownie and a cake.  The brown sugar, cinnamon, and butter make this recipe super sinfully rich. And the glaze on top is just delicious.  I don't recommend adding a frosting because that would make the dish a little too sweet.  I do, however, recommend adding the golden raisins (regular are fine too, but the golden complements the color better), and they are incredible when soaked in boiling orange juice for an hour. The shredded sweet potato (or yam) that you use melts away into the cake, similar to what a carrot cake would be like. I also love the sunny-orange-golden color this cake makes; it's unlike anything I've ever eaten before.  Do NOT use canned yams for this recipe because I have no idea how that would turn out!  I would think that it would make it too moist/wet.  Use fresh, shredded yams or sweet potatoes for the best results because they will be amazing!

Yield: 1 9x13 inch baking dish (about 20 servings)

Ingredients
1 cup butter, softened
1/2 cup packed brown sugar
1/2 cup white sugar
3 eggs, room temperature
2 teaspoons vanilla extract
1 1/2 cups all-purpose flour
1 teaspoon baking powder
1/2 teaspoon salt
1 teaspoon cinnamon
1/4 teaspoon ground ginger
1/4 teaspoon ground nutmeg
2 cups peeled and finely shredded sweet potato (or yam)
1 cup golden raisins (optional)

1 cup powdered sugar
2 tablespoons butter
2 tablespoons milk

Instructions:

1. Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13 inch baking dish.
2. In a large bowl, cream together the butter, brown sugar, and white sugar until smooth. Beat in the eggs one at a time, then stir in the vanilla. Combine the flour, baking powder, salt, cinnamon, ginger, and nutmeg; stir into the batter just until blended. Fold in the shredded yam and (optional) raisins. Spread the batter evenly in the greased baking dish.
3. Bake for 30 minutes in the preheated oven, until a toothpick inserted into the center, comes out clean. Mix together the confectioners' sugar, butter and milk until smooth. Spread over the brownies while they are still warm. They will absorb some of the glaze. Serve hot or warm.