This is one of those recipes that has been in my index card file for about 15 years, and that every once in a while I have to make. It sort of melts in your mouth. I got it from a secretary at a college I worked at years ago. She brought it to a potluck, and I just HAD to have the recipe. She was kind enough to share.
1 box yellow cake mix
3/4 cup oil (okay to substitute applesauce for half the oil, I always do)
1 cup buttermilk
1/2 cup sugar
1 cup brown sugar
1/2 cup chopped pecans
1 cup raisins
4 tsp. cinnamon
1 cup confectioners sugar
1 tbsp. vanilla
3 tsp. milk
Combine cake mix, oil, buttermilk, sugar and eggs. Pour into a greased sheet cake pan. Mix together the brown sugar, pecans, raisins and cinnamon. "Swirl" into cake. Bake at 300* for 1 hour.
Mix confectioners sugar, vanilla, and milk. Drizzle over cake while still hot.
This is also a great recipe for a brunch! Enjoy.