1 box yellow cake mix
1 (8 oz.) sour cream
1/2 c. sugar
3/4 c. oil
1 tsp. butter extract
4 eggs
1 tsp. vanilla
3 tbsp. brown sugar
2 tsp. cinnamon
1 c. chopped pecans

GLAZE:

1 c. powdered sugar, sifted
3 tbsp. evaporated milk
3 tbsp. butter, melted
1 tsp. vanilla
1 tsp. butter extract

Combine first 7 ingredients. Mix well. Combine brown sugar, cinnamon, and pecans. Grease and flour tube pan. Pour 1/3 cake batter into pan. Sprinkle 1/2 of pecan mixture, another 1/3 of batter, remaining pecan mixture and remaining batter. Bake at 325 degrees. Let cool in pan 10 minutes. Beat glaze ingredients until smooth. Pour over cake.