1 box yellow cake mix
1 c. buttermilk
4 eggs
1/2 c. oil
1/2 c. white sugar
1 c. brown sugar
1 1/2 tsp. cinnamon

Mix all ingredients except brown sugar and cinnamon. Pour into pan. Mix brown sugar and cinnamon. Pour over cake mix and swirl it.

Bake at 350°F for 30 minutes.