Pecan Pie Surprise Bars
["1 box yellow cake mix", "1/2 c. melted margarine", "1 egg", "1 1/2 c. corn syrup", "1 tsp. vanilla", "3 eggs", "1/2 c. brown sugar", "1 c. chopped pecans"]
["In large bowl, mix all except 2/3 of yellow cake mix, melted margarine and 1 egg.", "Press in greased 13 x 9-inch pan and bake at 350\u00b0 for 15 minutes until light brown.", "Prepare filling in same washed bowl."]
["yellow cake mix", "margarine", "egg", "corn syrup", "vanilla", "eggs", "brown sugar", "pecans"]