Pecan Pie Cake

1 yellow cake mix
1 egg
1/2 cup melted butter
1 1/2 cups white Karo syrup (light corn syrup)
3 eggs
1/2 cup dark brown sugar, packed
1 teaspoon vanilla extract
1 to 2 cups chopped pecans

Mix cake mix, 1 egg, and melted butter well. Reserve 2/3 cup of this batter. Spread the rest into a greased and floured 9 x 13-inch pan and bake at 325 degrees F for 15 minutes or until lightly browned.

Mix reserved 2/3 cup batter with syrup, 3 eggs, brown sugar, vanilla extract and pecans. Pour this filling on top of crust and cook about 50 to 60 minutes at 325 degrees F.