1Heat oven to 350°F. Lightly grease 13x9-inch pan with shortening or cooking spray.
2In large bowl, beat cake mix, milk, oil, eggs, sweet potatoes and apple pie spice with electric mixer on low speed 30 seconds. Beat on medium speed 2 minutes. Pour into pan.
3Bake 34 to 38 minutes or until toothpick inserted in center comes out clean. Cool in pan on cooling rack, about 1 hour.
4In medium bowl, beat cream cheese and butter with electric mixer on medium speed 2 minutes or until creamy. Beat in powdered sugar, brown sugar and vanilla. Stir in bacon. Frost cake. Sprinkle with pecans. Store covered in refrigerator.