1 pkg. yellow cake mix
4 eggs
2/3 c. vegetable oil
1/3 c. water
1 (8 oz.) carton sour cream
1/2 c. firmly packed brown sugar
1 tsp. cinnamon
2/3 c. chopped pecans

GLAZE:

1 c. sifted powdered sugar
2 tbsp. milk
1/2 tsp. vanilla extract

Combine first 5 ingredients in mixing bowl; beat at medium speed with electric mixer. Set aside.

Combine brown sugar, cinnamon and pecans; set aside. Pour 1/2 batter in greased and floured 13"x9"x2" baking pan. Sprinkle 1/2 of sugar mixture over batter. Repeat. Gently swirl batter with knife. Bake at 350 degrees for 30 to 35 minutes. Remove from oven. Drizzle glaze over cake and cool. Cut in squares.