Honey bun cake

1 box yellow cake mix
1 c buttermilk
4 eggs
3//4 cup veg. oil
1/2 c sugar

4 t cinnamon
1 c brown sugar

Icing
1 1/2 c conf. sugar
1 1/2 t vanilla
4 1/2 T milk

Combine cake mix, oil, buttermilk, sugar and eggs. Pour into a greased sheet cake pan.
Mix the brown sugar and cinnamon and swirl that into the mix.
Bake 350 for 1 hour POur icing over cake while still hot

Icing just mix conf. sugar, vanilla and milk together until smooth