1 pkg. yellow cake mix
1 egg
1/3 c. melted butter

FILLING:

2/3 c. reserved cake mix
1/2 c. brown sugar
1 c. dark corn syrup
3 eggs
1 tsp. vanilla
1 c. chopped pecans

Mix first 3 ingredients (reserving 2/3 cup cake mix). Spread in 9 x 13 pan. Bake at 350 degrees for 15 minutes. Meanwhile, mix remaining ingredients except nuts. Pour filling over first mixture and sprinkle nuts on top. Return to oven and bake for 20-25 minutes or until set.