These were a favorite at Clemson football games.
1 yellow cake mix, take out 2/3 C for filling
1/2 C melted margarine
Mix together. Spread on bottom of 9 x 13 pan and bake in preheated 350 oven for 15 minutes.
1 1/2 C dark Karo syrup
1/2 C packed brown sugar
2/3 C reserved cake mix
1 t vanilla
1 C chopped pecans
Mix together with electric beater for 1 or 2 minutes until smooth. Pour over baked cake and top with 1 C chopped pecans. Bake at 350 in a preheated oven for 30 - 35 minutes.