• Preheat oven to 350℉

Cake Batter

• In a medium mixing bowl stir together box of cake mix, sour cream, lightly beaten eggs, oil and vanilla.
  15.25 ounces yellow cake mix, 4 eggs, 1 cup sour cream, 3/4 cup canola oil, 1 teaspoon vanilla extract
• Add mashed sweet potatoes and stir well.
  1 cup mashed sweet potatoes
• Pour half of the batter into a lightly greased 9 x 13" baking dish.

Filling

• In a small mixing bowl stir together brown sugar, cinnamon and nutmeg. Mix well.
  1 cup brown sugar, 1 tablespoon cinnamon, 1 teaspoon nutmeg
• Add chopped pecans, stir well.
  1/3 cup pecans
• Pour over half of batter.
• Spoon remaining batter on top. Then use a butter knife to swirl together.
• Bake uncovered for 40 to 45 minutes until a toothpick inserted in the center comes out clean.

Icing

• Put powdered sugar in a small bowl and add 1 tablespoon of milk at a time. Stir well until liquid enough to drizzle over the warm cake.
  1 cup powdered sugar, 3 - 4 tablespoons milk