Honey Bun Cake

1 box yellow cake mix
4 eggs, beaten
3/4 cup oil
1 cup buttermilk

1 cup brown sugar
2 tsp. cinnamon
1/2 cup pecans

Mix first 4 ingredients well. Pour into a greased 13x9 baking dish. Combine brown sugar, cinnamon, and pecans. Swirl into batter. Bake at 300 degrees for 40-60 minutes. Check after 40 minutes with a toothpick.

Glaze:
1 cup powdered sugar
1 tsp. vanilla
2 tbsp. milk
1/2 cup pecans

Mix all ingredients together and pour over cake.