Crust:
2/3 cup sugar
1/2 cup butter, softened
1 teaspoon vanilla
1 1/2 cups flour
Filling:
2/3 cup packed brown sugar
1/2 cup corn syrup
1 teaspoon vanilla
1/4 teaspoon salt
3 eggs
1 cup of chopped pecans
Heat oven to 350. Lightly grease bottom and sides of 9 by 13 pan. In a large bowl, mix sugar, butter, and 1 tsp vanilla. Stir in flour, mix well. Press dough in bottom and 1/2 up sides of pan. Bake 15 minutes.
Beat brown sugar, corn syrup, 1 tsp. vanilla, and the salt and eggs with fork. Stir in pecans. Pour over crust. Bake 20-25 minutes or until set. Loosen edges while still warm, cool completely.
If you want chocolate on top..I recommend this,take 1 cup of chocolate chips, and 2 tablespoons of butter, and melt in the microwave, checking every so often and mixing. Once, melted spread on top of bars. Let cool and then enjoy a little piece of heaven. 
